/**
 * This file is from Mozilla pdf.js project
 * https://github.com/mozilla/pdf.js
 * Licensed under Mozilla License
 * https://github.com/mozilla/pdf.js/blob/master/LICENSE
 */
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Initializing PDFJS global object (if still undefined)
if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
}

PDFJS.version = '0.8.558';
PDFJS.build = 'ea50c07';

(function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
   'use strict';

   /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
   /* Copyright 2012 Mozilla Foundation
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    */
   /* globals Cmd, ColorSpace, Dict, MozBlobBuilder, Name, PDFJS, Ref */

   'use strict';

   var globalScope = (typeof window === 'undefined') ? this : window;

   var isWorker = (typeof window == 'undefined');

   var ERRORS = 0, WARNINGS = 1, INFOS = 5;
   var verbosity = WARNINGS;

   var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];

   var TextRenderingMode = {
      FILL: 0,
      STROKE: 1,
      FILL_STROKE: 2,
      INVISIBLE: 3,
      FILL_ADD_TO_PATH: 4,
      STROKE_ADD_TO_PATH: 5,
      FILL_STROKE_ADD_TO_PATH: 6,
      ADD_TO_PATH: 7,
      FILL_STROKE_MASK: 3,
      ADD_TO_PATH_FLAG: 4
   };

// The global PDFJS object exposes the API
// In production, it will be declared outside a global wrapper
// In development, it will be declared here
   if (!globalScope.PDFJS) {
      globalScope.PDFJS = {};
   }

   globalScope.PDFJS.pdfBug = false;


// Use only for debugging purposes. This should not be used in any code that is
// in mozilla master.
   var log = (function() {
      if ('console' in globalScope && 'log' in globalScope['console']) {
         return globalScope['console']['log'].bind(globalScope['console']);
      } else {
         return function nop() {
         };
      }
   })();

// A notice for devs that will not trigger the fallback UI.  These are good
// for things that are helpful to devs, such as warning that Workers were
// disabled, which is important to devs but not end users.
   function info(msg) {
      if (verbosity >= INFOS) {
         log('Info: ' + msg);
         PDFJS.LogManager.notify('info', msg);
      }
   }

// Non-fatal warnings that should trigger the fallback UI.
   function warn(msg) {
      if (verbosity >= WARNINGS) {
         log('Warning: ' + msg);
         PDFJS.LogManager.notify('warn', msg);
      }
   }

// Fatal errors that should trigger the fallback UI and halt execution by
// throwing an exception.
   function error(msg) {
      // If multiple arguments were passed, pass them all to the log function.
      if (arguments.length > 1) {
         var logArguments = ['Error:'];
         logArguments.push.apply(logArguments, arguments);
         log.apply(null, logArguments);
         // Join the arguments into a single string for the lines below.
         msg = [].join.call(arguments, ' ');
      } else {
         log('Error: ' + msg);
      }
      log(backtrace());
      PDFJS.LogManager.notify('error', msg);
      throw new Error(msg);
   }

// Missing features that should trigger the fallback UI.
   function TODO(what) {
      warn('TODO: ' + what);
   }

   function backtrace() {
      try {
         throw new Error();
      } catch (e) {
         return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
      }
   }

   function assert(cond, msg) {
      if (!cond)
         error(msg);
   }

// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
// absolute URL, it will be returned as is.
   function combineUrl(baseUrl, url) {
      if (!url)
         return baseUrl;
      if (url.indexOf(':') >= 0)
         return url;
      if (url.charAt(0) == '/') {
         // absolute path
         var i = baseUrl.indexOf('://');
         i = baseUrl.indexOf('/', i + 3);
         return baseUrl.substring(0, i) + url;
      } else {
         // relative path
         var pathLength = baseUrl.length, i;
         i = baseUrl.lastIndexOf('#');
         pathLength = i >= 0 ? i : pathLength;
         i = baseUrl.lastIndexOf('?', pathLength);
         pathLength = i >= 0 ? i : pathLength;
         var prefixLength = baseUrl.lastIndexOf('/', pathLength);
         return baseUrl.substring(0, prefixLength + 1) + url;
      }
   }

// Validates if URL is safe and allowed, e.g. to avoid XSS.
   function isValidUrl(url, allowRelative) {
      if (!url) {
         return false;
      }
      var colon = url.indexOf(':');
      if (colon < 0) {
         return allowRelative;
      }
      var protocol = url.substr(0, colon);
      switch (protocol) {
         case 'http':
         case 'https':
         case 'ftp':
         case 'mailto':
            return true;
         default:
            return false;
      }
   }
   PDFJS.isValidUrl = isValidUrl;

// In a well-formed PDF, |cond| holds.  If it doesn't, subsequent
// behavior is undefined.
   function assertWellFormed(cond, msg) {
      if (!cond)
         error(msg);
   }

   var LogManager = PDFJS.LogManager = (function LogManagerClosure() {
      var loggers = [];
      return {
         addLogger: function logManager_addLogger(logger) {
            loggers.push(logger);
         },
         notify: function(type, message) {
            for (var i = 0, ii = loggers.length; i < ii; i++) {
               var logger = loggers[i];
               if (logger[type])
                  logger[type](message);
            }
         }
      };
   })();

   function shadow(obj, prop, value) {
      Object.defineProperty(obj, prop, { value: value,
         enumerable: true,
         configurable: true,
         writable: false });
      return value;
   }

   var PasswordResponses = PDFJS.PasswordResponses = {
      NEED_PASSWORD: 1,
      INCORRECT_PASSWORD: 2
   };

   var PasswordException = (function PasswordExceptionClosure() {
      function PasswordException(msg, code) {
         this.name = 'PasswordException';
         this.message = msg;
         this.code = code;
      }

      PasswordException.prototype = new Error();
      PasswordException.constructor = PasswordException;

      return PasswordException;
   })();

   var UnknownErrorException = (function UnknownErrorExceptionClosure() {
      function UnknownErrorException(msg, details) {
         this.name = 'UnknownErrorException';
         this.message = msg;
         this.details = details;
      }

      UnknownErrorException.prototype = new Error();
      UnknownErrorException.constructor = UnknownErrorException;

      return UnknownErrorException;
   })();

   var InvalidPDFException = (function InvalidPDFExceptionClosure() {
      function InvalidPDFException(msg) {
         this.name = 'InvalidPDFException';
         this.message = msg;
      }

      InvalidPDFException.prototype = new Error();
      InvalidPDFException.constructor = InvalidPDFException;

      return InvalidPDFException;
   })();

   var MissingPDFException = (function MissingPDFExceptionClosure() {
      function MissingPDFException(msg) {
         this.name = 'MissingPDFException';
         this.message = msg;
      }

      MissingPDFException.prototype = new Error();
      MissingPDFException.constructor = MissingPDFException;

      return MissingPDFException;
   })();

   var NotImplementedException = (function NotImplementedExceptionClosure() {
      function NotImplementedException(msg) {
         this.message = msg;
      }

      NotImplementedException.prototype = new Error();
      NotImplementedException.prototype.name = 'NotImplementedException';
      NotImplementedException.constructor = NotImplementedException;

      return NotImplementedException;
   })();

   var MissingDataException = (function MissingDataExceptionClosure() {
      function MissingDataException(begin, end) {
         this.begin = begin;
         this.end = end;
         this.message = 'Missing data [begin, end)';
      }

      MissingDataException.prototype = new Error();
      MissingDataException.prototype.name = 'MissingDataException';
      MissingDataException.constructor = MissingDataException;

      return MissingDataException;
   })();

   var XRefParseException = (function XRefParseExceptionClosure() {
      function XRefParseException(msg) {
         this.message = msg;
      }

      XRefParseException.prototype = new Error();
      XRefParseException.prototype.name = 'XRefParseException';
      XRefParseException.constructor = XRefParseException;

      return XRefParseException;
   })();


   function bytesToString(bytes) {
      var str = '';
      var length = bytes.length;
      for (var n = 0; n < length; ++n)
         str += String.fromCharCode(bytes[n]);
      return str;
   }

   function stringToBytes(str) {
      var length = str.length;
      var bytes = new Uint8Array(length);
      for (var n = 0; n < length; ++n)
         bytes[n] = str.charCodeAt(n) & 0xFF;
      return bytes;
   }

   var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];

   var Util = PDFJS.Util = (function UtilClosure() {
      function Util() {}

      Util.makeCssRgb = function Util_makeCssRgb(rgb) {
         return 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')';
      };

      Util.makeCssCmyk = function Util_makeCssCmyk(cmyk) {
         var rgb = ColorSpace.singletons.cmyk.getRgb(cmyk, 0);
         return Util.makeCssRgb(rgb);
      };

      // Concatenates two transformation matrices together and returns the result.
      Util.transform = function Util_transform(m1, m2) {
         return [
            m1[0] * m2[0] + m1[2] * m2[1],
            m1[1] * m2[0] + m1[3] * m2[1],
            m1[0] * m2[2] + m1[2] * m2[3],
            m1[1] * m2[2] + m1[3] * m2[3],
            m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
            m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
         ];
      };

      // For 2d affine transforms
      Util.applyTransform = function Util_applyTransform(p, m) {
         var xt = p[0] * m[0] + p[1] * m[2] + m[4];
         var yt = p[0] * m[1] + p[1] * m[3] + m[5];
         return [xt, yt];
      };

      Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
         var d = m[0] * m[3] - m[1] * m[2];
         var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
         var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
         return [xt, yt];
      };

      // Applies the transform to the rectangle and finds the minimum axially
      // aligned bounding box.
      Util.getAxialAlignedBoundingBox =
         function Util_getAxialAlignedBoundingBox(r, m) {

            var p1 = Util.applyTransform(r, m);
            var p2 = Util.applyTransform(r.slice(2, 4), m);
            var p3 = Util.applyTransform([r[0], r[3]], m);
            var p4 = Util.applyTransform([r[2], r[1]], m);
            return [
               Math.min(p1[0], p2[0], p3[0], p4[0]),
               Math.min(p1[1], p2[1], p3[1], p4[1]),
               Math.max(p1[0], p2[0], p3[0], p4[0]),
               Math.max(p1[1], p2[1], p3[1], p4[1])
            ];
         };

      Util.inverseTransform = function Util_inverseTransform(m) {
         var d = m[0] * m[3] - m[1] * m[2];
         return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
            (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
      };

      // Apply a generic 3d matrix M on a 3-vector v:
      //   | a b c |   | X |
      //   | d e f | x | Y |
      //   | g h i |   | Z |
      // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
      // with v as [X,Y,Z]
      Util.apply3dTransform = function Util_apply3dTransform(m, v) {
         return [
            m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
            m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
            m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
         ];
      };

      // This calculation uses Singular Value Decomposition.
      // The SVD can be represented with formula A = USV. We are interested in the
      // matrix S here because it represents the scale values.
      Util.singularValueDecompose2dScale =
         function Util_singularValueDecompose2dScale(m) {

            var transpose = [m[0], m[2], m[1], m[3]];

            // Multiply matrix m with its transpose.
            var a = m[0] * transpose[0] + m[1] * transpose[2];
            var b = m[0] * transpose[1] + m[1] * transpose[3];
            var c = m[2] * transpose[0] + m[3] * transpose[2];
            var d = m[2] * transpose[1] + m[3] * transpose[3];

            // Solve the second degree polynomial to get roots.
            var first = (a + d) / 2;
            var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
            var sx = first + second || 1;
            var sy = first - second || 1;

            // Scale values are the square roots of the eigenvalues.
            return [Math.sqrt(sx), Math.sqrt(sy)];
         };

      // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
      // For coordinate systems whose origin lies in the bottom-left, this
      // means normalization to (BL,TR) ordering. For systems with origin in the
      // top-left, this means (TL,BR) ordering.
      Util.normalizeRect = function Util_normalizeRect(rect) {
         var r = rect.slice(0); // clone rect
         if (rect[0] > rect[2]) {
            r[0] = rect[2];
            r[2] = rect[0];
         }
         if (rect[1] > rect[3]) {
            r[1] = rect[3];
            r[3] = rect[1];
         }
         return r;
      };

      // Returns a rectangle [x1, y1, x2, y2] corresponding to the
      // intersection of rect1 and rect2. If no intersection, returns 'false'
      // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
      Util.intersect = function Util_intersect(rect1, rect2) {
         function compare(a, b) {
            return a - b;
         }

         // Order points along the axes
         var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
            orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
            result = [];

         rect1 = Util.normalizeRect(rect1);
         rect2 = Util.normalizeRect(rect2);

         // X: first and second points belong to different rectangles?
         if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
            (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
            // Intersection must be between second and third points
            result[0] = orderedX[1];
            result[2] = orderedX[2];
         } else {
            return false;
         }

         // Y: first and second points belong to different rectangles?
         if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
            (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
            // Intersection must be between second and third points
            result[1] = orderedY[1];
            result[3] = orderedY[2];
         } else {
            return false;
         }

         return result;
      };

      Util.sign = function Util_sign(num) {
         return num < 0 ? -1 : 1;
      };

      // TODO(mack): Rename appendToArray
      Util.concatenateToArray = function concatenateToArray(arr1, arr2) {
         Array.prototype.push.apply(arr1, arr2);
      };

      Util.prependToArray = function concatenateToArray(arr1, arr2) {
         Array.prototype.unshift.apply(arr1, arr2);
      };

      Util.extendObj = function extendObj(obj1, obj2) {
         for (var key in obj2) {
            obj1[key] = obj2[key];
         }
      };

      Util.getInheritableProperty = function Util_getInheritableProperty(dict,
                                                                         name) {
         while (dict && !dict.has(name)) {
            dict = dict.get('Parent');
         }
         if (!dict) {
            return null;
         }
         return dict.get(name);
      };

      Util.inherit = function Util_inherit(sub, base, prototype) {
         sub.prototype = Object.create(base.prototype);
         sub.prototype.constructor = sub;
         for (var prop in prototype) {
            sub.prototype[prop] = prototype[prop];
         }
      };

      Util.loadScript = function Util_loadScript(src, callback) {
         var script = document.createElement('script');
         var loaded = false;
         script.setAttribute('src', src);
         if (callback) {
            script.onload = function() {
               if (!loaded) {
                  callback();
               }
               loaded = true;
            };
         }
         document.getElementsByTagName('head')[0].appendChild(script);
      };

      return Util;
   })();

   var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
      function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
         this.viewBox = viewBox;
         this.scale = scale;
         this.rotation = rotation;
         this.offsetX = offsetX;
         this.offsetY = offsetY;

         // creating transform to convert pdf coordinate system to the normal
         // canvas like coordinates taking in account scale and rotation
         var centerX = (viewBox[2] + viewBox[0]) / 2;
         var centerY = (viewBox[3] + viewBox[1]) / 2;
         var rotateA, rotateB, rotateC, rotateD;
         rotation = rotation % 360;
         rotation = rotation < 0 ? rotation + 360 : rotation;
         switch (rotation) {
            case 180:
               rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
               break;
            case 90:
               rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
               break;
            case 270:
               rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
               break;
            //case 0:
            default:
               rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
               break;
         }

         if (dontFlip) {
            rotateC = -rotateC; rotateD = -rotateD;
         }

         var offsetCanvasX, offsetCanvasY;
         var width, height;
         if (rotateA === 0) {
            offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
            offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
            width = Math.abs(viewBox[3] - viewBox[1]) * scale;
            height = Math.abs(viewBox[2] - viewBox[0]) * scale;
         } else {
            offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
            offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
            width = Math.abs(viewBox[2] - viewBox[0]) * scale;
            height = Math.abs(viewBox[3] - viewBox[1]) * scale;
         }
         // creating transform for the following operations:
         // translate(-centerX, -centerY), rotate and flip vertically,
         // scale, and translate(offsetCanvasX, offsetCanvasY)
         this.transform = [
            rotateA * scale,
            rotateB * scale,
            rotateC * scale,
            rotateD * scale,
            offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
            offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
         ];

         this.width = width;
         this.height = height;
         this.fontScale = scale;
      }
      PageViewport.prototype = {
         clone: function PageViewPort_clone(args) {
            args = args || {};
            var scale = 'scale' in args ? args.scale : this.scale;
            var rotation = 'rotation' in args ? args.rotation : this.rotation;
            return new PageViewport(this.viewBox.slice(), scale, rotation,
               this.offsetX, this.offsetY, args.dontFlip);
         },
         convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
            return Util.applyTransform([x, y], this.transform);
         },
         convertToViewportRectangle:
            function PageViewport_convertToViewportRectangle(rect) {
               var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
               var br = Util.applyTransform([rect[2], rect[3]], this.transform);
               return [tl[0], tl[1], br[0], br[1]];
            },
         convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
            return Util.applyInverseTransform([x, y], this.transform);
         }
      };
      return PageViewport;
   })();

   var PDFStringTranslateTable = [
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
      0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
      0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
      0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
   ];

   function stringToPDFString(str) {
      var i, n = str.length, str2 = '';
      if (str[0] === '\xFE' && str[1] === '\xFF') {
         // UTF16BE BOM
         for (i = 2; i < n; i += 2)
            str2 += String.fromCharCode(
               (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1));
      } else {
         for (i = 0; i < n; ++i) {
            var code = PDFStringTranslateTable[str.charCodeAt(i)];
            str2 += code ? String.fromCharCode(code) : str.charAt(i);
         }
      }
      return str2;
   }

   function stringToUTF8String(str) {
      return decodeURIComponent(escape(str));
   }

   function isEmptyObj(obj) {
      for (var key in obj) {
         return false;
      }
      return true;
   }

   function isBool(v) {
      return typeof v == 'boolean';
   }

   function isInt(v) {
      return typeof v == 'number' && ((v | 0) == v);
   }

   function isNum(v) {
      return typeof v == 'number';
   }

   function isString(v) {
      return typeof v == 'string';
   }

   function isNull(v) {
      return v === null;
   }

   function isName(v) {
      return v instanceof Name;
   }

   function isCmd(v, cmd) {
      return v instanceof Cmd && (!cmd || v.cmd == cmd);
   }

   function isDict(v, type) {
      if (!(v instanceof Dict)) {
         return false;
      }
      if (!type) {
         return true;
      }
      var dictType = v.get('Type');
      return isName(dictType) && dictType.name == type;
   }

   function isArray(v) {
      return v instanceof Array;
   }

   function isStream(v) {
      return typeof v == 'object' && v !== null && v !== undefined &&
         ('getBytes' in v);
   }

   function isArrayBuffer(v) {
      return typeof v == 'object' && v !== null && v !== undefined &&
         ('byteLength' in v);
   }

   function isRef(v) {
      return v instanceof Ref;
   }

   function isPDFFunction(v) {
      var fnDict;
      if (typeof v != 'object')
         return false;
      else if (isDict(v))
         fnDict = v;
      else if (isStream(v))
         fnDict = v.dict;
      else
         return false;
      return fnDict.has('FunctionType');
   }

   /**
    * The following promise implementation tries to generally implment the
    * Promise/A+ spec. Some notable differences from other promise libaries are:
    * - There currently isn't a seperate deferred and promise object.
    * - Unhandled rejections eventually show an error if they aren't handled.
    *
    * Based off of the work in:
    * https://bugzilla.mozilla.org/show_bug.cgi?id=810490
    */
   var Promise = PDFJS.Promise = (function PromiseClosure() {
      var STATUS_PENDING = 0;
      var STATUS_RESOLVED = 1;
      var STATUS_REJECTED = 2;

      // In an attempt to avoid silent exceptions, unhandled rejections are
      // tracked and if they aren't handled in a certain amount of time an
      // error is logged.
      var REJECTION_TIMEOUT = 500;

      var HandlerManager = {
         handlers: [],
         running: false,
         unhandledRejections: [],
         pendingRejectionCheck: false,

         scheduleHandlers: function scheduleHandlers(promise) {
            if (promise._status == STATUS_PENDING) {
               return;
            }

            this.handlers = this.handlers.concat(promise._handlers);
            promise._handlers = [];

            if (this.running) {
               return;
            }
            this.running = true;

            setTimeout(this.runHandlers.bind(this), 0);
         },

         runHandlers: function runHandlers() {
            while (this.handlers.length > 0) {
               var handler = this.handlers.shift();

               var nextStatus = handler.thisPromise._status;
               var nextValue = handler.thisPromise._value;

               try {
                  if (nextStatus === STATUS_RESOLVED) {
                     if (typeof(handler.onResolve) == 'function') {
                        nextValue = handler.onResolve(nextValue);
                     }
                  } else if (typeof(handler.onReject) === 'function') {
                     nextValue = handler.onReject(nextValue);
                     nextStatus = STATUS_RESOLVED;

                     if (handler.thisPromise._unhandledRejection) {
                        this.removeUnhandeledRejection(handler.thisPromise);
                     }
                  }
               } catch (ex) {
                  nextStatus = STATUS_REJECTED;
                  nextValue = ex;
               }

               handler.nextPromise._updateStatus(nextStatus, nextValue);
            }

            this.running = false;
         },

         addUnhandledRejection: function addUnhandledRejection(promise) {
            this.unhandledRejections.push({
               promise: promise,
               time: Date.now()
            });
            this.scheduleRejectionCheck();
         },

         removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
            promise._unhandledRejection = false;
            for (var i = 0; i < this.unhandledRejections.length; i++) {
               if (this.unhandledRejections[i].promise === promise) {
                  this.unhandledRejections.splice(i);
                  i--;
               }
            }
         },

         scheduleRejectionCheck: function scheduleRejectionCheck() {
            if (this.pendingRejectionCheck) {
               return;
            }
            this.pendingRejectionCheck = true;
            setTimeout(function rejectionCheck() {
               this.pendingRejectionCheck = false;
               var now = Date.now();
               for (var i = 0; i < this.unhandledRejections.length; i++) {
                  if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
                     var unhandled = this.unhandledRejections[i].promise._value;
                     var msg = 'Unhandled rejection: ' + unhandled;
                     if (unhandled.stack) {
                        msg += '\n' + unhandled.stack;
                     }
                     warn(msg);
                     this.unhandledRejections.splice(i);
                     i--;
                  }
               }
               if (this.unhandledRejections.length) {
                  this.scheduleRejectionCheck();
               }
            }.bind(this), REJECTION_TIMEOUT);
         }
      };

      function Promise() {
         this._status = STATUS_PENDING;
         this._handlers = [];
      }
      /**
       * Builds a promise that is resolved when all the passed in promises are
       * resolved.
       * @param {Promise[]} promises Array of promises to wait for.
       * @return {Promise} New dependant promise.
       */
      Promise.all = function Promise_all(promises) {
         var deferred = new Promise();
         var unresolved = promises.length;
         var results = [];
         if (unresolved === 0) {
            deferred.resolve(results);
            return deferred;
         }
         function reject(reason) {
            if (deferred._status === STATUS_REJECTED) {
               return;
            }
            results = [];
            deferred.reject(reason);
         }
         for (var i = 0, ii = promises.length; i < ii; ++i) {
            var promise = promises[i];
            promise.then((function(i) {
               return function(value) {
                  if (deferred._status === STATUS_REJECTED) {
                     return;
                  }
                  results[i] = value;
                  unresolved--;
                  if (unresolved === 0)
                     deferred.resolve(results);
               };
            })(i), reject);
         }
         return deferred;
      };

      Promise.prototype = {
         _status: null,
         _value: null,
         _handlers: null,
         _unhandledRejection: null,

         _updateStatus: function Promise__updateStatus(status, value) {
            if (this._status === STATUS_RESOLVED ||
               this._status === STATUS_REJECTED) {
               return;
            }

            if (status == STATUS_RESOLVED &&
               value && typeof(value.then) === 'function') {
               value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
                  this._updateStatus.bind(this, STATUS_REJECTED));
               return;
            }

            this._status = status;
            this._value = value;

            if (status === STATUS_REJECTED && this._handlers.length === 0) {
               this._unhandledRejection = true;
               HandlerManager.addUnhandledRejection(this);
            }

            HandlerManager.scheduleHandlers(this);
         },

         get isResolved() {
            return this._status === STATUS_RESOLVED;
         },

         get isRejected() {
            return this._status === STATUS_REJECTED;
         },

         resolve: function Promise_resolve(value) {
            this._updateStatus(STATUS_RESOLVED, value);
         },

         reject: function Promise_reject(reason) {
            this._updateStatus(STATUS_REJECTED, reason);
         },

         then: function Promise_then(onResolve, onReject) {
            var nextPromise = new Promise();
            this._handlers.push({
               thisPromise: this,
               onResolve: onResolve,
               onReject: onReject,
               nextPromise: nextPromise
            });
            HandlerManager.scheduleHandlers(this);
            return nextPromise;
         }
      };

      return Promise;
   })();

   var StatTimer = (function StatTimerClosure() {
      function rpad(str, pad, length) {
         while (str.length < length)
            str += pad;
         return str;
      }
      function StatTimer() {
         this.started = {};
         this.times = [];
         this.enabled = true;
      }
      StatTimer.prototype = {
         time: function StatTimer_time(name) {
            if (!this.enabled)
               return;
            if (name in this.started)
               warn('Timer is already running for ' + name);
            this.started[name] = Date.now();
         },
         timeEnd: function StatTimer_timeEnd(name) {
            if (!this.enabled)
               return;
            if (!(name in this.started))
               warn('Timer has not been started for ' + name);
            this.times.push({
               'name': name,
               'start': this.started[name],
               'end': Date.now()
            });
            // Remove timer from started so it can be called again.
            delete this.started[name];
         },
         toString: function StatTimer_toString() {
            var times = this.times;
            var out = '';
            // Find the longest name for padding purposes.
            var longest = 0;
            for (var i = 0, ii = times.length; i < ii; ++i) {
               var name = times[i]['name'];
               if (name.length > longest)
                  longest = name.length;
            }
            for (var i = 0, ii = times.length; i < ii; ++i) {
               var span = times[i];
               var duration = span.end - span.start;
               out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n';
            }
            return out;
         }
      };
      return StatTimer;
   })();

   PDFJS.createBlob = function createBlob(data, contentType) {
      if (typeof Blob === 'function')
         return new Blob([data], { type: contentType });
      // Blob builder is deprecated in FF14 and removed in FF18.
      var bb = new MozBlobBuilder();
      bb.append(data);
      return bb.getBlob(contentType);
   };

   function MessageHandler(name, comObj) {
      this.name = name;
      this.comObj = comObj;
      this.callbackIndex = 1;
      var callbacks = this.callbacks = {};
      var ah = this.actionHandler = {};

      ah['console_log'] = [function ahConsoleLog(data) {
         log.apply(null, data);
      }];
      // If there's no console available, console_error in the
      // action handler will do nothing.
      if ('console' in globalScope) {
         ah['console_error'] = [function ahConsoleError(data) {
            globalScope['console'].error.apply(null, data);
         }];
      } else {
         ah['console_error'] = [function ahConsoleError(data) {
            log.apply(null, data);
         }];
      }
      ah['_warn'] = [function ah_Warn(data) {
         warn(data);
      }];

      comObj.onmessage = function messageHandlerComObjOnMessage(event) {
         var data = event.data;
         if (data.isReply) {
            var callbackId = data.callbackId;
            if (data.callbackId in callbacks) {
               var callback = callbacks[callbackId];
               delete callbacks[callbackId];
               callback(data.data);
            } else {
               error('Cannot resolve callback ' + callbackId);
            }
         } else if (data.action in ah) {
            var action = ah[data.action];
            if (data.callbackId) {
               var promise = new Promise();
               promise.then(function(resolvedData) {
                  comObj.postMessage({
                     isReply: true,
                     callbackId: data.callbackId,
                     data: resolvedData
                  });
               });
               action[0].call(action[1], data.data, promise);
            } else {
               action[0].call(action[1], data.data);
            }
         } else {
            error('Unkown action from worker: ' + data.action);
         }
      };
   }

   MessageHandler.prototype = {
      on: function messageHandlerOn(actionName, handler, scope) {
         var ah = this.actionHandler;
         if (ah[actionName]) {
            error('There is already an actionName called "' + actionName + '"');
         }
         ah[actionName] = [handler, scope];
      },
      /**
       * Sends a message to the comObj to invoke the action with the supplied data.
       * @param {String} actionName Action to call.
       * @param {JSON} data JSON data to send.
       * @param {function} [callback] Optional callback that will handle a reply.
       */
      send: function messageHandlerSend(actionName, data, callback) {
         var message = {
            action: actionName,
            data: data
         };
         if (callback) {
            var callbackId = this.callbackIndex++;
            this.callbacks[callbackId] = callback;
            message.callbackId = callbackId;
         }
         this.comObj.postMessage(message);
      }
   };

   function loadJpegStream(id, imageData, objs) {
      var img = new Image();
      img.onload = (function loadJpegStream_onloadClosure() {
         objs.resolve(id, img);
      });
      img.src = 'data:image/jpeg;base64,' + window.btoa(imageData);
   }


   var ColorSpace = (function ColorSpaceClosure() {
      // Constructor should define this.numComps, this.defaultColor, this.name
      function ColorSpace() {
         error('should not call ColorSpace constructor');
      }

      ColorSpace.prototype = {
         /**
          * Converts the color value to the RGB color. The color components are
          * located in the src array starting from the srcOffset. Returns the array
          * of the rgb components, each value ranging from [0,255].
          */
         getRgb: function ColorSpace_getRgb(src, srcOffset) {
            error('Should not call ColorSpace.getRgb');
         },
         /**
          * Converts the color value to the RGB color, similar to the getRgb method.
          * The result placed into the dest array starting from the destOffset.
          */
         getRgbItem: function ColorSpace_getRgb(src, srcOffset, dest, destOffset) {
            error('Should not call ColorSpace.getRgbItem');
         },
         /**
          * Converts the specified number of the color values to the RGB colors.
          * The colors are located in the src array starting from the srcOffset.
          * The result is placed into the dest array starting from the destOffset.
          * The src array items shall be in [0,2^bits) range, the dest array items
          * will be in [0,255] range.
          */
         getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
                                                        dest, destOffset, bits) {
            error('Should not call ColorSpace.getRgbBuffer');
         },
         /**
          * Determines amount of the bytes is required to store the reslut of the
          * conversion that done by the getRgbBuffer method.
          */
         getOutputLength: function ColorSpace_getOutputLength(inputLength) {
            error('Should not call ColorSpace.getOutputLength');
         },
         /**
          * Returns true if source data will be equal the result/output data.
          */
         isPassthrough: function ColorSpace_isPassthrough(bits) {
            return false;
         },
         /**
          * Creates the output buffer and converts the specified number of the color
          * values to the RGB colors, similar to the getRgbBuffer.
          */
         createRgbBuffer: function ColorSpace_createRgbBuffer(src, srcOffset,
                                                              count, bits) {
            if (this.isPassthrough(bits)) {
               return src.subarray(srcOffset);
            }
            var dest = new Uint8Array(count * 3);
            var numComponentColors = 1 << bits;
            // Optimization: create a color map when there is just one component and
            // we are converting more colors than the size of the color map. We
            // don't build the map if the colorspace is gray or rgb since those
            // methods are faster than building a map. This mainly offers big speed
            // ups for indexed and alternate colorspaces.
            if (this.numComps === 1 && count > numComponentColors &&
               this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
               // TODO it may be worth while to cache the color map. While running
               // testing I never hit a cache so I will leave that out for now (perhaps
               // we are reparsing colorspaces too much?).
               var allColors = bits <= 8 ? new Uint8Array(numComponentColors) :
                  new Uint16Array(numComponentColors);
               for (var i = 0; i < numComponentColors; i++) {
                  allColors[i] = i;
               }
               var colorMap = new Uint8Array(numComponentColors * 3);
               this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bits);

               var destOffset = 0;
               for (var i = 0; i < count; ++i) {
                  var key = src[srcOffset++] * 3;
                  dest[destOffset++] = colorMap[key];
                  dest[destOffset++] = colorMap[key + 1];
                  dest[destOffset++] = colorMap[key + 2];
               }
               return dest;
            }
            this.getRgbBuffer(src, srcOffset, count, dest, 0, bits);
            return dest;
         },
         /**
          * True if the colorspace has components in the default range of [0, 1].
          * This should be true for all colorspaces except for lab color spaces
          * which are [0,100], [-128, 127], [-128, 127].
          */
         usesZeroToOneRange: true
      };

      ColorSpace.parse = function ColorSpace_parse(cs, xref, res) {
         var IR = ColorSpace.parseToIR(cs, xref, res);
         if (IR instanceof AlternateCS)
            return IR;

         return ColorSpace.fromIR(IR);
      };

      ColorSpace.fromIR = function ColorSpace_fromIR(IR) {
         var name = isArray(IR) ? IR[0] : IR;

         switch (name) {
            case 'DeviceGrayCS':
               return this.singletons.gray;
            case 'DeviceRgbCS':
               return this.singletons.rgb;
            case 'DeviceCmykCS':
               return this.singletons.cmyk;
            case 'PatternCS':
               var basePatternCS = IR[1];
               if (basePatternCS)
                  basePatternCS = ColorSpace.fromIR(basePatternCS);
               return new PatternCS(basePatternCS);
            case 'IndexedCS':
               var baseIndexedCS = IR[1];
               var hiVal = IR[2];
               var lookup = IR[3];
               return new IndexedCS(ColorSpace.fromIR(baseIndexedCS), hiVal, lookup);
            case 'AlternateCS':
               var numComps = IR[1];
               var alt = IR[2];
               var tintFnIR = IR[3];

               return new AlternateCS(numComps, ColorSpace.fromIR(alt),
                  PDFFunction.fromIR(tintFnIR));
            case 'LabCS':
               var whitePoint = IR[1].WhitePoint;
               var blackPoint = IR[1].BlackPoint;
               var range = IR[1].Range;
               return new LabCS(whitePoint, blackPoint, range);
            default:
               error('Unkown name ' + name);
         }
         return null;
      };

      ColorSpace.parseToIR = function ColorSpace_parseToIR(cs, xref, res) {
         if (isName(cs)) {
            var colorSpaces = res.get('ColorSpace');
            if (isDict(colorSpaces)) {
               var refcs = colorSpaces.get(cs.name);
               if (refcs)
                  cs = refcs;
            }
         }

         cs = xref.fetchIfRef(cs);
         var mode;

         if (isName(cs)) {
            mode = cs.name;
            this.mode = mode;

            switch (mode) {
               case 'DeviceGray':
               case 'G':
                  return 'DeviceGrayCS';
               case 'DeviceRGB':
               case 'RGB':
                  return 'DeviceRgbCS';
               case 'DeviceCMYK':
               case 'CMYK':
                  return 'DeviceCmykCS';
               case 'Pattern':
                  return ['PatternCS', null];
               default:
                  error('unrecognized colorspace ' + mode);
            }
         } else if (isArray(cs)) {
            mode = cs[0].name;
            this.mode = mode;

            switch (mode) {
               case 'DeviceGray':
               case 'G':
                  return 'DeviceGrayCS';
               case 'DeviceRGB':
               case 'RGB':
                  return 'DeviceRgbCS';
               case 'DeviceCMYK':
               case 'CMYK':
                  return 'DeviceCmykCS';
               case 'CalGray':
                  return 'DeviceGrayCS';
               case 'CalRGB':
                  return 'DeviceRgbCS';
               case 'ICCBased':
                  var stream = xref.fetchIfRef(cs[1]);
                  var dict = stream.dict;
                  var numComps = dict.get('N');
                  if (numComps == 1)
                     return 'DeviceGrayCS';
                  if (numComps == 3)
                     return 'DeviceRgbCS';
                  if (numComps == 4)
                     return 'DeviceCmykCS';
                  break;
               case 'Pattern':
                  var basePatternCS = cs[1];
                  if (basePatternCS)
                     basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
                  return ['PatternCS', basePatternCS];
               case 'Indexed':
               case 'I':
                  var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
                  var hiVal = cs[2] + 1;
                  var lookup = xref.fetchIfRef(cs[3]);
                  if (isStream(lookup)) {
                     lookup = lookup.getBytes();
                  }
                  return ['IndexedCS', baseIndexedCS, hiVal, lookup];
               case 'Separation':
               case 'DeviceN':
                  var name = cs[1];
                  var numComps = 1;
                  if (isName(name))
                     numComps = 1;
                  else if (isArray(name))
                     numComps = name.length;
                  var alt = ColorSpace.parseToIR(cs[2], xref, res);
                  var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
                  return ['AlternateCS', numComps, alt, tintFnIR];
               case 'Lab':
                  var params = cs[1].getAll();
                  return ['LabCS', params];
               default:
                  error('unimplemented color space object "' + mode + '"');
            }
         } else {
            error('unrecognized color space object: "' + cs + '"');
         }
         return null;
      };
      /**
       * Checks if a decode map matches the default decode map for a color space.
       * This handles the general decode maps where there are two values per
       * component. e.g. [0, 1, 0, 1, 0, 1] for a RGB color.
       * This does not handle Lab, Indexed, or Pattern decode maps since they are
       * slightly different.
       * @param {Array} decode Decode map (usually from an image).
       * @param {Number} n Number of components the color space has.
       */
      ColorSpace.isDefaultDecode = function ColorSpace_isDefaultDecode(decode, n) {
         if (!decode)
            return true;

         if (n * 2 !== decode.length) {
            warn('The decode map is not the correct length');
            return true;
         }
         for (var i = 0, ii = decode.length; i < ii; i += 2) {
            if (decode[i] !== 0 || decode[i + 1] != 1)
               return false;
         }
         return true;
      };

      ColorSpace.singletons = {
         get gray() {
            return shadow(this, 'gray', new DeviceGrayCS());
         },
         get rgb() {
            return shadow(this, 'rgb', new DeviceRgbCS());
         },
         get cmyk() {
            return shadow(this, 'cmyk', new DeviceCmykCS());
         }
      };

      return ColorSpace;
   })();

   /**
    * Alternate color space handles both Separation and DeviceN color spaces.  A
    * Separation color space is actually just a DeviceN with one color component.
    * Both color spaces use a tinting function to convert colors to a base color
    * space.
    */
   var AlternateCS = (function AlternateCSClosure() {
      function AlternateCS(numComps, base, tintFn) {
         this.name = 'Alternate';
         this.numComps = numComps;
         this.defaultColor = new Float32Array(numComps);
         for (var i = 0; i < numComps; ++i) {
            this.defaultColor[i] = 1;
         }
         this.base = base;
         this.tintFn = tintFn;
      }

      AlternateCS.prototype = {
         getRgb: function AlternateCS_getRgb(src, srcOffset) {
            var rgb = new Uint8Array(3);
            this.getRgbItem(src, srcOffset, rgb, 0);
            return rgb;
         },
         getRgbItem: function AlternateCS_getRgbItem(src, srcOffset,
                                                     dest, destOffset) {
            var baseNumComps = this.base.numComps;
            var input = 'subarray' in src ?
               src.subarray(srcOffset, srcOffset + this.numComps) :
               Array.prototype.slice.call(src, srcOffset, srcOffset + this.numComps);
            var tinted = this.tintFn(input);
            this.base.getRgbItem(tinted, 0, dest, destOffset);
         },
         getRgbBuffer: function AlternateCS_getRgbBuffer(src, srcOffset, count,
                                                         dest, destOffset, bits) {
            var tintFn = this.tintFn;
            var base = this.base;
            var scale = 1 / ((1 << bits) - 1);
            var baseNumComps = base.numComps;
            var usesZeroToOneRange = base.usesZeroToOneRange;
            var isPassthrough = base.isPassthrough(8) || !usesZeroToOneRange;
            var pos = isPassthrough ? destOffset : 0;
            var baseBuf = isPassthrough ? dest : new Uint8Array(baseNumComps * count);
            var numComps = this.numComps;

            var scaled = new Float32Array(numComps);
            for (var i = 0; i < count; i++) {
               for (var j = 0; j < numComps; j++) {
                  scaled[j] = src[srcOffset++] * scale;
               }
               var tinted = tintFn(scaled);
               if (usesZeroToOneRange) {
                  for (var j = 0; j < baseNumComps; j++) {
                     baseBuf[pos++] = tinted[j] * 255;
                  }
               } else {
                  base.getRgbItem(tinted, 0, baseBuf, pos);
                  pos += baseNumComps;
               }
            }
            if (!isPassthrough) {
               base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8);
            }
         },
         getOutputLength: function AlternateCS_getOutputLength(inputLength) {
            return this.base.getOutputLength(inputLength *
               this.base.numComps / this.numComps);
         },
         isPassthrough: ColorSpace.prototype.isPassthrough,
         createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
         isDefaultDecode: function AlternateCS_isDefaultDecode(decodeMap) {
            return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
         },
         usesZeroToOneRange: true
      };

      return AlternateCS;
   })();

   var PatternCS = (function PatternCSClosure() {
      function PatternCS(baseCS) {
         this.name = 'Pattern';
         this.base = baseCS;
      }
      PatternCS.prototype = {};

      return PatternCS;
   })();

   var IndexedCS = (function IndexedCSClosure() {
      function IndexedCS(base, highVal, lookup) {
         this.name = 'Indexed';
         this.numComps = 1;
         this.defaultColor = new Uint8Array([0]);
         this.base = base;
         this.highVal = highVal;

         var baseNumComps = base.numComps;
         var length = baseNumComps * highVal;
         var lookupArray;

         if (isStream(lookup)) {
            lookupArray = new Uint8Array(length);
            var bytes = lookup.getBytes(length);
            lookupArray.set(bytes);
         } else if (isString(lookup)) {
            lookupArray = new Uint8Array(length);
            for (var i = 0; i < length; ++i)
               lookupArray[i] = lookup.charCodeAt(i);
         } else if (lookup instanceof Uint8Array || lookup instanceof Array) {
            lookupArray = lookup;
         } else {
            error('Unrecognized lookup table: ' + lookup);
         }
         this.lookup = lookupArray;
      }

      IndexedCS.prototype = {
         getRgb: function IndexedCS_getRgb(src, srcOffset) {
            var numComps = this.base.numComps;
            var start = src[srcOffset] * numComps;
            return this.base.getRgb(this.lookup, start);
         },
         getRgbItem: function IndexedCS_getRgbItem(src, srcOffset,
                                                   dest, destOffset) {
            var numComps = this.base.numComps;
            var start = src[srcOffset] * numComps;
            this.base.getRgbItem(this.lookup, start, dest, destOffset);
         },
         getRgbBuffer: function IndexedCS_getRgbBuffer(src, srcOffset, count,
                                                       dest, destOffset) {
            var base = this.base;
            var numComps = base.numComps;
            var outputDelta = base.getOutputLength(numComps);
            var lookup = this.lookup;

            for (var i = 0; i < count; ++i) {
               var lookupPos = src[srcOffset++] * numComps;
               base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8);
               destOffset += outputDelta;
            }
         },
         getOutputLength: function IndexedCS_getOutputLength(inputLength) {
            return this.base.getOutputLength(inputLength * this.base.numComps);
         },
         isPassthrough: ColorSpace.prototype.isPassthrough,
         createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
         isDefaultDecode: function IndexedCS_isDefaultDecode(decodeMap) {
            // indexed color maps shouldn't be changed
            return true;
         },
         usesZeroToOneRange: true
      };
      return IndexedCS;
   })();

   var DeviceGrayCS = (function DeviceGrayCSClosure() {
      function DeviceGrayCS() {
         this.name = 'DeviceGray';
         this.numComps = 1;
         this.defaultColor = new Float32Array([0]);
      }

      DeviceGrayCS.prototype = {
         getRgb: function DeviceGrayCS_getRgb(src, srcOffset) {
            var rgb = new Uint8Array(3);
            this.getRgbItem(src, srcOffset, rgb, 0);
            return rgb;
         },
         getRgbItem: function DeviceGrayCS_getRgbItem(src, srcOffset,
                                                      dest, destOffset) {
            var c = (src[srcOffset] * 255) | 0;
            c = c < 0 ? 0 : c > 255 ? 255 : c;
            dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
         },
         getRgbBuffer: function DeviceGrayCS_getRgbBuffer(src, srcOffset, count,
                                                          dest, destOffset, bits) {
            var scale = 255 / ((1 << bits) - 1);
            var j = srcOffset, q = destOffset;
            for (var i = 0; i < count; ++i) {
               var c = (scale * src[j++]) | 0;
               dest[q++] = c;
               dest[q++] = c;
               dest[q++] = c;
            }
         },
         getOutputLength: function DeviceGrayCS_getOutputLength(inputLength) {
            return inputLength * 3;
         },
         isPassthrough: ColorSpace.prototype.isPassthrough,
         createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
         isDefaultDecode: function DeviceGrayCS_isDefaultDecode(decodeMap) {
            return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
         },
         usesZeroToOneRange: true
      };
      return DeviceGrayCS;
   })();

   var DeviceRgbCS = (function DeviceRgbCSClosure() {
      function DeviceRgbCS() {
         this.name = 'DeviceRGB';
         this.numComps = 3;
         this.defaultColor = new Float32Array([0, 0, 0]);
      }
      DeviceRgbCS.prototype = {
         getRgb: function DeviceRgbCS_getRgb(src, srcOffset) {
            var rgb = new Uint8Array(3);
            this.getRgbItem(src, srcOffset, rgb, 0);
            return rgb;
         },
         getRgbItem: function DeviceRgbCS_getRgbItem(src, srcOffset,
                                                     dest, destOffset) {
            var r = (src[srcOffset] * 255) | 0;
            var g = (src[srcOffset + 1] * 255) | 0;
            var b = (src[srcOffset + 2] * 255) | 0;
            dest[destOffset] = r < 0 ? 0 : r > 255 ? 255 : r;
            dest[destOffset + 1] = g < 0 ? 0 : g > 255 ? 255 : g;
            dest[destOffset + 2] = b < 0 ? 0 : b > 255 ? 255 : b;
         },
         getRgbBuffer: function DeviceRgbCS_getRgbBuffer(src, srcOffset, count,
                                                         dest, destOffset, bits) {
            var length = count * 3;
            if (bits == 8) {
               dest.set(src.subarray(srcOffset, srcOffset + length), destOffset);
               return;
            }
            var scale = 255 / ((1 << bits) - 1);
            var j = srcOffset, q = destOffset;
            for (var i = 0; i < length; ++i) {
               dest[q++] = (scale * src[j++]) | 0;
            }
         },
         getOutputLength: function DeviceRgbCS_getOutputLength(inputLength) {
            return inputLength;
         },
         isPassthrough: function DeviceRgbCS_isPassthrough(bits) {
            return bits == 8;
         },
         createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
         isDefaultDecode: function DeviceRgbCS_isDefaultDecode(decodeMap) {
            return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
         },
         usesZeroToOneRange: true
      };
      return DeviceRgbCS;
   })();

   var DeviceCmykCS = (function DeviceCmykCSClosure() {
      // The coefficients below was found using numerical analysis: the method of
      // steepest descent for the sum((f_i - color_value_i)^2) for r/g/b colors,
      // where color_value is the tabular value from the table of sampled RGB colors
      // from CMYK US Web Coated (SWOP) colorspace, and f_i is the corresponding
      // CMYK color conversion using the estimation below:
      //   f(A, B,.. N) = Acc+Bcm+Ccy+Dck+c+Fmm+Gmy+Hmk+Im+Jyy+Kyk+Ly+Mkk+Nk+255
      function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
         var c = src[srcOffset + 0] * srcScale;
         var m = src[srcOffset + 1] * srcScale;
         var y = src[srcOffset + 2] * srcScale;
         var k = src[srcOffset + 3] * srcScale;

         var r =
            c * (-4.387332384609988 * c + 54.48615194189176 * m +
               18.82290502165302 * y + 212.25662451639585 * k +
               -285.2331026137004) +
               m * (1.7149763477362134 * m - 5.6096736904047315 * y +
                  -17.873870861415444 * k - 5.497006427196366) +
               y * (-2.5217340131683033 * y - 21.248923337353073 * k +
                  17.5119270841813) +
               k * (-21.86122147463605 * k - 189.48180835922747) + 255;
         var g =
            c * (8.841041422036149 * c + 60.118027045597366 * m +
               6.871425592049007 * y + 31.159100130055922 * k +
               -79.2970844816548) +
               m * (-15.310361306967817 * m + 17.575251261109482 * y +
                  131.35250912493976 * k - 190.9453302588951) +
               y * (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) +
               k * (-20.737325471181034 * k - 187.80453709719578) + 255;
         var b =
            c * (0.8842522430003296 * c + 8.078677503112928 * m +
               30.89978309703729 * y - 0.23883238689178934 * k +
               -14.183576799673286) +
               m * (10.49593273432072 * m + 63.02378494754052 * y +
                  50.606957656360734 * k - 112.23884253719248) +
               y * (0.03296041114873217 * y + 115.60384449646641 * k +
                  -193.58209356861505) +
               k * (-22.33816807309886 * k - 180.12613974708367) + 255;

         dest[destOffset] = r > 255 ? 255 : r < 0 ? 0 : r;
         dest[destOffset + 1] = g > 255 ? 255 : g < 0 ? 0 : g;
         dest[destOffset + 2] = b > 255 ? 255 : b < 0 ? 0 : b;
      }

      function DeviceCmykCS() {
         this.name = 'DeviceCMYK';
         this.numComps = 4;
         this.defaultColor = new Float32Array([0, 0, 0, 1]);
      }
      DeviceCmykCS.prototype = {
         getRgb: function DeviceCmykCS_getRgb(src, srcOffset) {
            var rgb = new Uint8Array(3);
            convertToRgb(src, srcOffset, 1, rgb, 0);
            return rgb;
         },
         getRgbItem: function DeviceCmykCS_getRgbItem(src, srcOffset,
                                                      dest, destOffset) {
            convertToRgb(src, srcOffset, 1, dest, destOffset);
         },
         getRgbBuffer: function DeviceCmykCS_getRgbBuffer(src, srcOffset, count,
                                                          dest, destOffset, bits) {
            var scale = 1 / ((1 << bits) - 1);
            for (var i = 0; i < count; i++) {
               convertToRgb(src, srcOffset, scale, dest, destOffset);
               srcOffset += 4;
               destOffset += 3;
            }
         },
         getOutputLength: function DeviceCmykCS_getOutputLength(inputLength) {
            return (inputLength >> 2) * 3;
         },
         isPassthrough: ColorSpace.prototype.isPassthrough,
         createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
         isDefaultDecode: function DeviceCmykCS_isDefaultDecode(decodeMap) {
            return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
         },
         usesZeroToOneRange: true
      };

      return DeviceCmykCS;
   })();

//
// LabCS: Based on "PDF Reference, Sixth Ed", p.250
//
   var LabCS = (function LabCSClosure() {
      function LabCS(whitePoint, blackPoint, range) {
         this.name = 'Lab';
         this.numComps = 3;
         this.defaultColor = new Float32Array([0, 0, 0]);

         if (!whitePoint)
            error('WhitePoint missing - required for color space Lab');
         blackPoint = blackPoint || [0, 0, 0];
         range = range || [-100, 100, -100, 100];

         // Translate args to spec variables
         this.XW = whitePoint[0];
         this.YW = whitePoint[1];
         this.ZW = whitePoint[2];
         this.amin = range[0];
         this.amax = range[1];
         this.bmin = range[2];
         this.bmax = range[3];

         // These are here just for completeness - the spec doesn't offer any
         // formulas that use BlackPoint in Lab
         this.XB = blackPoint[0];
         this.YB = blackPoint[1];
         this.ZB = blackPoint[2];

         // Validate vars as per spec
         if (this.XW < 0 || this.ZW < 0 || this.YW !== 1)
            error('Invalid WhitePoint components, no fallback available');

         if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
            info('Invalid BlackPoint, falling back to default');
            this.XB = this.YB = this.ZB = 0;
         }

         if (this.amin > this.amax || this.bmin > this.bmax) {
            info('Invalid Range, falling back to defaults');
            this.amin = -100;
            this.amax = 100;
            this.bmin = -100;
            this.bmax = 100;
         }
      }

      // Function g(x) from spec
      function fn_g(x) {
         if (x >= 6 / 29)
            return x * x * x;
         else
            return (108 / 841) * (x - 4 / 29);
      }

      function decode(value, high1, low2, high2) {
         return low2 + (value) * (high2 - low2) / (high1);
      }

      // If decoding is needed maxVal should be 2^bits per component - 1.
      function convertToRgb(cs, src, srcOffset, maxVal, dest, destOffset) {
         // XXX: Lab input is in the range of [0, 100], [amin, amax], [bmin, bmax]
         // not the usual [0, 1]. If a command like setFillColor is used the src
         // values will already be within the correct range. However, if we are
         // converting an image we have to map the values to the correct range given
         // above.
         // Ls,as,bs <---> L*,a*,b* in the spec
         var Ls = src[srcOffset];
         var as = src[srcOffset + 1];
         var bs = src[srcOffset + 2];
         if (maxVal !== false) {
            Ls = decode(Ls, maxVal, 0, 100);
            as = decode(as, maxVal, cs.amin, cs.amax);
            bs = decode(bs, maxVal, cs.bmin, cs.bmax);
         }

         // Adjust limits of 'as' and 'bs'
         as = as > cs.amax ? cs.amax : as < cs.amin ? cs.amin : as;
         bs = bs > cs.bmax ? cs.bmax : bs < cs.bmin ? cs.bmin : bs;

         // Computes intermediate variables X,Y,Z as per spec
         var M = (Ls + 16) / 116;
         var L = M + (as / 500);
         var N = M - (bs / 200);

         var X = cs.XW * fn_g(L);
         var Y = cs.YW * fn_g(M);
         var Z = cs.ZW * fn_g(N);

         var r, g, b;
         // Using different conversions for D50 and D65 white points,
         // per http://www.color.org/srgb.pdf
         if (cs.ZW < 1) {
            // Assuming D50 (X=0.9642, Y=1.00, Z=0.8249)
            r = X * 3.1339 + Y * -1.6170 + Z * -0.4906;
            g = X * -0.9785 + Y * 1.9160 + Z * 0.0333;
            b = X * 0.0720 + Y * -0.2290 + Z * 1.4057;
         } else {
            // Assuming D65 (X=0.9505, Y=1.00, Z=1.0888)
            r = X * 3.2406 + Y * -1.5372 + Z * -0.4986;
            g = X * -0.9689 + Y * 1.8758 + Z * 0.0415;
            b = X * 0.0557 + Y * -0.2040 + Z * 1.0570;
         }
         // clamp color values to [0,1] range then convert to [0,255] range.
         dest[destOffset] = Math.sqrt(r < 0 ? 0 : r > 1 ? 1 : r) * 255;
         dest[destOffset + 1] = Math.sqrt(g < 0 ? 0 : g > 1 ? 1 : g) * 255;
         dest[destOffset + 2] = Math.sqrt(b < 0 ? 0 : b > 1 ? 1 : b) * 255;
      }

      LabCS.prototype = {
         getRgb: function LabCS_getRgb(src, srcOffset) {
            var rgb = new Uint8Array(3);
            convertToRgb(this, src, srcOffset, false, rgb, 0);
            return rgb;
         },
         getRgbItem: function LabCS_getRgbItem(src, srcOffset, dest, destOffset) {
            convertToRgb(this, src, srcOffset, false, dest, destOffset);
         },
         getRgbBuffer: function LabCS_getRgbBuffer(src, srcOffset, count,
                                                   dest, destOffset, bits) {
            var maxVal = (1 << bits) - 1;
            for (var i = 0; i < count; i++) {
               convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
               srcOffset += 3;
               destOffset += 3;
            }
         },
         getOutputLength: function LabCS_getOutputLength(inputLength) {
            return inputLength;
         },
         isPassthrough: ColorSpace.prototype.isPassthrough,
         isDefaultDecode: function LabCS_isDefaultDecode(decodeMap) {
            // XXX: Decoding is handled with the lab conversion because of the strange
            // ranges that are used.
            return true;
         },
         usesZeroToOneRange: false
      };
      return LabCS;
   })();


   var PatternType = {
      AXIAL: 2,
      RADIAL: 3
   };

   var Pattern = (function PatternClosure() {
      // Constructor should define this.getPattern
      function Pattern() {
         error('should not call Pattern constructor');
      }

      Pattern.prototype = {
         // Input: current Canvas context
         // Output: the appropriate fillStyle or strokeStyle
         getPattern: function Pattern_getPattern(ctx) {
            error('Should not call Pattern.getStyle: ' + ctx);
         }
      };

      Pattern.shadingFromIR = function Pattern_shadingFromIR(raw) {
         return Shadings[raw[0]].fromIR(raw);
      };

      Pattern.parseShading = function Pattern_parseShading(shading, matrix, xref,
                                                           res) {

         var dict = isStream(shading) ? shading.dict : shading;
         var type = dict.get('ShadingType');

         switch (type) {
            case PatternType.AXIAL:
            case PatternType.RADIAL:
               // Both radial and axial shadings are handled by RadialAxial shading.
               return new Shadings.RadialAxial(dict, matrix, xref, res);
            default:
               TODO('Unsupported shading type: ' + type);
               return new Shadings.Dummy();
         }
      };
      return Pattern;
   })();

   var Shadings = {};

// A small number to offset the first/last color stops so we can insert ones to
// support extend.  Number.MIN_VALUE appears to be too small and breaks the
// extend. 1e-7 works in FF but chrome seems to use an even smaller sized number
// internally so we have to go bigger.
   Shadings.SMALL_NUMBER = 1e-2;

// Radial and axial shading have very similar implementations
// If needed, the implementations can be broken into two classes
   Shadings.RadialAxial = (function RadialAxialClosure() {
      function RadialAxial(dict, matrix, xref, res, ctx) {
         this.matrix = matrix;
         this.coordsArr = dict.get('Coords');
         this.shadingType = dict.get('ShadingType');
         this.type = 'Pattern';
         this.ctx = ctx;
         var cs = dict.get('ColorSpace', 'CS');
         cs = ColorSpace.parse(cs, xref, res);
         this.cs = cs;

         var t0 = 0.0, t1 = 1.0;
         if (dict.has('Domain')) {
            var domainArr = dict.get('Domain');
            t0 = domainArr[0];
            t1 = domainArr[1];
         }

         var extendStart = false, extendEnd = false;
         if (dict.has('Extend')) {
            var extendArr = dict.get('Extend');
            extendStart = extendArr[0];
            extendEnd = extendArr[1];
         }

         if (this.shadingType === PatternType.RADIAL &&
            (!extendStart || !extendEnd)) {
            // Radial gradient only currently works if either circle is fully within
            // the other circle.
            var x1 = this.coordsArr[0];
            var y1 = this.coordsArr[1];
            var r1 = this.coordsArr[2];
            var x2 = this.coordsArr[3];
            var y2 = this.coordsArr[4];
            var r2 = this.coordsArr[5];
            var distance = Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
            if (r1 <= r2 + distance &&
               r2 <= r1 + distance) {
               warn('Unsupported radial gradient.');
            }
         }

         this.extendStart = extendStart;
         this.extendEnd = extendEnd;

         var fnObj = dict.get('Function');
         var fn;
         if (isArray(fnObj)) {
            var fnArray = [];
            for (var j = 0, jj = fnObj.length; j < jj; j++) {
               var obj = xref.fetchIfRef(fnObj[j]);
               if (!isPDFFunction(obj)) {
                  error('Invalid function');
               }
               fnArray.push(PDFFunction.parse(xref, obj));
            }
            fn = function radialAxialColorFunction(arg) {
               var out = [];
               for (var i = 0, ii = fnArray.length; i < ii; i++) {
                  out.push(fnArray[i](arg)[0]);
               }
               return out;
            };
         } else {
            if (!isPDFFunction(fnObj)) {
               error('Invalid function');
            }
            fn = PDFFunction.parse(xref, fnObj);
         }

         // 10 samples seems good enough for now, but probably won't work
         // if there are sharp color changes. Ideally, we would implement
         // the spec faithfully and add lossless optimizations.
         var diff = t1 - t0;
         var step = diff / 10;

         var colorStops = this.colorStops = [];

         // Protect against bad domains so we don't end up in an infinte loop below.
         if (t0 >= t1 || step <= 0) {
            // Acrobat doesn't seem to handle these cases so we'll ignore for
            // now.
            info('Bad shading domain.');
            return;
         }

         for (var i = t0; i <= t1; i += step) {
            var rgbColor = cs.getRgb(fn([i]), 0);
            var cssColor = Util.makeCssRgb(rgbColor);
            colorStops.push([(i - t0) / diff, cssColor]);
         }

         var background = 'transparent';
         if (dict.has('Background')) {
            var rgbColor = cs.getRgb(dict.get('Background'), 0);
            background = Util.makeCssRgb(rgbColor);
         }

         if (!extendStart) {
            // Insert a color stop at the front and offset the first real color stop
            // so it doesn't conflict with the one we insert.
            colorStops.unshift([0, background]);
            colorStops[1][0] += Shadings.SMALL_NUMBER;
         }
         if (!extendEnd) {
            // Same idea as above in extendStart but for the end.
            colorStops[colorStops.length - 1][0] -= Shadings.SMALL_NUMBER;
            colorStops.push([1, background]);
         }

         this.colorStops = colorStops;
      }

      RadialAxial.fromIR = function RadialAxial_fromIR(raw) {
         var type = raw[1];
         var colorStops = raw[2];
         var p0 = raw[3];
         var p1 = raw[4];
         var r0 = raw[5];
         var r1 = raw[6];
         return {
            type: 'Pattern',
            getPattern: function RadialAxial_getPattern(ctx) {
               var grad;
               if (type == PatternType.AXIAL)
                  grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
               else if (type == PatternType.RADIAL)
                  grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);

               for (var i = 0, ii = colorStops.length; i < ii; ++i) {
                  var c = colorStops[i];
                  grad.addColorStop(c[0], c[1]);
               }
               return grad;
            }
         };
      };

      RadialAxial.prototype = {
         getIR: function RadialAxial_getIR() {
            var coordsArr = this.coordsArr;
            var type = this.shadingType;
            if (type == PatternType.AXIAL) {
               var p0 = [coordsArr[0], coordsArr[1]];
               var p1 = [coordsArr[2], coordsArr[3]];
               var r0 = null;
               var r1 = null;
            } else if (type == PatternType.RADIAL) {
               var p0 = [coordsArr[0], coordsArr[1]];
               var p1 = [coordsArr[3], coordsArr[4]];
               var r0 = coordsArr[2];
               var r1 = coordsArr[5];
            } else {
               error('getPattern type unknown: ' + type);
            }

            var matrix = this.matrix;
            if (matrix) {
               p0 = Util.applyTransform(p0, matrix);
               p1 = Util.applyTransform(p1, matrix);
            }

            return ['RadialAxial', type, this.colorStops, p0, p1, r0, r1];
         }
      };

      return RadialAxial;
   })();

   Shadings.Dummy = (function DummyClosure() {
      function Dummy() {
         this.type = 'Pattern';
      }

      Dummy.fromIR = function Dummy_fromIR() {
         return {
            type: 'Pattern',
            getPattern: function Dummy_fromIR_getPattern() {
               return 'hotpink';
            }
         };
      };

      Dummy.prototype = {
         getIR: function Dummy_getIR() {
            return ['Dummy'];
         }
      };
      return Dummy;
   })();

   var TilingPattern = (function TilingPatternClosure() {
      var PaintType = {
         COLORED: 1,
         UNCOLORED: 2
      };

      var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough

      function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
         this.name = IR[1][0].name;
         this.operatorList = IR[2];
         this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
         this.bbox = IR[4];
         this.xstep = IR[5];
         this.ystep = IR[6];
         this.paintType = IR[7];
         this.tilingType = IR[8];
         this.color = color;
         this.objs = objs;
         this.commonObjs = commonObjs;
         this.baseTransform = baseTransform;
         this.type = 'Pattern';
         this.ctx = ctx;
      }

      TilingPattern.getIR = function TilingPattern_getIR(operatorList, dict, args) {
         var matrix = dict.get('Matrix');
         var bbox = dict.get('BBox');
         var xstep = dict.get('XStep');
         var ystep = dict.get('YStep');
         var paintType = dict.get('PaintType');
         var tilingType = dict.get('TilingType');

         return [
            'TilingPattern', args, operatorList, matrix, bbox, xstep, ystep,
            paintType, tilingType
         ];
      };

      TilingPattern.prototype = {
         createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
            var operatorList = this.operatorList;
            var bbox = this.bbox;
            var xstep = this.xstep;
            var ystep = this.ystep;
            var paintType = this.paintType;
            var tilingType = this.tilingType;
            var color = this.color;
            var objs = this.objs;
            var commonObjs = this.commonObjs;
            var ctx = this.ctx;

            TODO('TilingType: ' + tilingType);

            var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];

            var topLeft = [x0, y0];
            // we want the canvas to be as large as the step size
            var botRight = [x0 + xstep, y0 + ystep];

            var width = botRight[0] - topLeft[0];
            var height = botRight[1] - topLeft[1];

            // Obtain scale from matrix and current transformation matrix.
            var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
            var curMatrixScale = Util.singularValueDecompose2dScale(
               this.baseTransform);
            var combinedScale = [matrixScale[0] * curMatrixScale[0],
               matrixScale[1] * curMatrixScale[1]];

            // MAX_PATTERN_SIZE is used to avoid OOM situation.
            // Use width and height values that are as close as possible to the end
            // result when the pattern is used. Too low value makes the pattern look
            // blurry. Too large value makes it look too crispy.
            width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
               MAX_PATTERN_SIZE);

            height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
               MAX_PATTERN_SIZE);

            var tmpCanvas = CachedCanvases.getCanvas('pattern', width, height, true);
            var tmpCtx = tmpCanvas.context;
            var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
            graphics.groupLevel = owner.groupLevel;

            this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);

            this.setScale(width, height, xstep, ystep);
            this.transformToScale(graphics);

            // transform coordinates to pattern space
            var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
            graphics.transform.apply(graphics, tmpTranslate);

            this.clipBbox(graphics, bbox, x0, y0, x1, y1);

            graphics.executeOperatorList(operatorList);
            return tmpCanvas.canvas;
         },

         setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
            this.scale = [width / xstep, height / ystep];
         },

         transformToScale: function TilingPattern_transformToScale(graphics) {
            var scale = this.scale;
            var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
            graphics.transform.apply(graphics, tmpScale);
         },

         scaleToContext: function TilingPattern_scaleToContext() {
            var scale = this.scale;
            this.ctx.scale(1 / scale[0], 1 / scale[1]);
         },

         clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
            if (bbox && isArray(bbox) && 4 == bbox.length) {
               var bboxWidth = x1 - x0;
               var bboxHeight = y1 - y0;
               graphics.rectangle(x0, y0, bboxWidth, bboxHeight);
               graphics.clip();
               graphics.endPath();
            }
         },

         setFillAndStrokeStyleToContext:
            function setFillAndStrokeStyleToContext(context, paintType, color) {
               switch (paintType) {
                  case PaintType.COLORED:
                     var ctx = this.ctx;
                     context.fillStyle = ctx.fillStyle;
                     context.strokeStyle = ctx.strokeStyle;
                     break;
                  case PaintType.UNCOLORED:
                     var rgbColor = ColorSpace.singletons.rgb.getRgb(color, 0);
                     var cssColor = Util.makeCssRgb(rgbColor);
                     context.fillStyle = cssColor;
                     context.strokeStyle = cssColor;
                     break;
                  default:
                     error('Unsupported paint type: ' + paintType);
               }
            },

         getPattern: function TilingPattern_getPattern(ctx, owner) {
            var temporaryPatternCanvas = this.createPatternCanvas(owner);

            var ctx = this.ctx;
            ctx.setTransform.apply(ctx, this.baseTransform);
            ctx.transform.apply(ctx, this.matrix);
            this.scaleToContext();

            return ctx.createPattern(temporaryPatternCanvas, 'repeat');
         }
      };

      return TilingPattern;
   })();



   var PDFFunction = (function PDFFunctionClosure() {
      var CONSTRUCT_SAMPLED = 0;
      var CONSTRUCT_INTERPOLATED = 2;
      var CONSTRUCT_STICHED = 3;
      var CONSTRUCT_POSTSCRIPT = 4;

      return {
         getSampleArray: function PDFFunction_getSampleArray(size, outputSize, bps,
                                                             str) {
            var length = 1;
            for (var i = 0, ii = size.length; i < ii; i++)
               length *= size[i];
            length *= outputSize;

            var array = [];
            var codeSize = 0;
            var codeBuf = 0;
            // 32 is a valid bps so shifting won't work
            var sampleMul = 1.0 / (Math.pow(2.0, bps) - 1);

            var strBytes = str.getBytes((length * bps + 7) / 8);
            var strIdx = 0;
            for (var i = 0; i < length; i++) {
               while (codeSize < bps) {
                  codeBuf <<= 8;
                  codeBuf |= strBytes[strIdx++];
                  codeSize += 8;
               }
               codeSize -= bps;
               array.push((codeBuf >> codeSize) * sampleMul);
               codeBuf &= (1 << codeSize) - 1;
            }
            return array;
         },

         getIR: function PDFFunction_getIR(xref, fn) {
            var dict = fn.dict;
            if (!dict)
               dict = fn;

            var types = [this.constructSampled,
               null,
               this.constructInterpolated,
               this.constructStiched,
               this.constructPostScript];

            var typeNum = dict.get('FunctionType');
            var typeFn = types[typeNum];
            if (!typeFn)
               error('Unknown type of function');

            return typeFn.call(this, fn, dict, xref);
         },

         fromIR: function PDFFunction_fromIR(IR) {
            var type = IR[0];
            switch (type) {
               case CONSTRUCT_SAMPLED:
                  return this.constructSampledFromIR(IR);
               case CONSTRUCT_INTERPOLATED:
                  return this.constructInterpolatedFromIR(IR);
               case CONSTRUCT_STICHED:
                  return this.constructStichedFromIR(IR);
               //case CONSTRUCT_POSTSCRIPT:
               default:
                  return this.constructPostScriptFromIR(IR);
            }
         },

         parse: function PDFFunction_parse(xref, fn) {
            var IR = this.getIR(xref, fn);
            return this.fromIR(IR);
         },

         constructSampled: function PDFFunction_constructSampled(str, dict) {
            function toMultiArray(arr) {
               var inputLength = arr.length;
               var outputLength = arr.length / 2;
               var out = [];
               var index = 0;
               for (var i = 0; i < inputLength; i += 2) {
                  out[index] = [arr[i], arr[i + 1]];
                  ++index;
               }
               return out;
            }
            var domain = dict.get('Domain');
            var range = dict.get('Range');

            if (!domain || !range)
               error('No domain or range');

            var inputSize = domain.length / 2;
            var outputSize = range.length / 2;

            domain = toMultiArray(domain);
            range = toMultiArray(range);

            var size = dict.get('Size');
            var bps = dict.get('BitsPerSample');
            var order = dict.get('Order') || 1;
            if (order !== 1) {
               // No description how cubic spline interpolation works in PDF32000:2008
               // As in poppler, ignoring order, linear interpolation may work as good
               TODO('No support for cubic spline interpolation: ' + order);
            }

            var encode = dict.get('Encode');
            if (!encode) {
               encode = [];
               for (var i = 0; i < inputSize; ++i) {
                  encode.push(0);
                  encode.push(size[i] - 1);
               }
            }
            encode = toMultiArray(encode);

            var decode = dict.get('Decode');
            if (!decode)
               decode = range;
            else
               decode = toMultiArray(decode);

            var samples = this.getSampleArray(size, outputSize, bps, str);

            return [
               CONSTRUCT_SAMPLED, inputSize, domain, encode, decode, samples, size,
               outputSize, Math.pow(2, bps) - 1, range
            ];
         },

         constructSampledFromIR: function PDFFunction_constructSampledFromIR(IR) {
            // See chapter 3, page 109 of the PDF reference
            function interpolate(x, xmin, xmax, ymin, ymax) {
               return ymin + ((x - xmin) * ((ymax - ymin) / (xmax - xmin)));
            }

            return function constructSampledFromIRResult(args) {
               // See chapter 3, page 110 of the PDF reference.
               var m = IR[1];
               var domain = IR[2];
               var encode = IR[3];
               var decode = IR[4];
               var samples = IR[5];
               var size = IR[6];
               var n = IR[7];
               var mask = IR[8];
               var range = IR[9];

               if (m != args.length)
                  error('Incorrect number of arguments: ' + m + ' != ' +
                     args.length);

               var x = args;

               // Building the cube vertices: its part and sample index
               // http://rjwagner49.com/Mathematics/Interpolation.pdf
               var cubeVertices = 1 << m;
               var cubeN = new Float64Array(cubeVertices);
               var cubeVertex = new Uint32Array(cubeVertices);
               for (var j = 0; j < cubeVertices; j++)
                  cubeN[j] = 1;

               var k = n, pos = 1;
               // Map x_i to y_j for 0 <= i < m using the sampled function.
               for (var i = 0; i < m; ++i) {
                  // x_i' = min(max(x_i, Domain_2i), Domain_2i+1)
                  var domain_2i = domain[i][0];
                  var domain_2i_1 = domain[i][1];
                  var xi = Math.min(Math.max(x[i], domain_2i), domain_2i_1);

                  // e_i = Interpolate(x_i', Domain_2i, Domain_2i+1,
                  //                   Encode_2i, Encode_2i+1)
                  var e = interpolate(xi, domain_2i, domain_2i_1,
                     encode[i][0], encode[i][1]);

                  // e_i' = min(max(e_i, 0), Size_i - 1)
                  var size_i = size[i];
                  e = Math.min(Math.max(e, 0), size_i - 1);

                  // Adjusting the cube: N and vertex sample index
                  var e0 = e < size_i - 1 ? Math.floor(e) : e - 1; // e1 = e0 + 1;
                  var n0 = e0 + 1 - e; // (e1 - e) / (e1 - e0);
                  var n1 = e - e0; // (e - e0) / (e1 - e0);
                  var offset0 = e0 * k;
                  var offset1 = offset0 + k; // e1 * k
                  for (var j = 0; j < cubeVertices; j++) {
                     if (j & pos) {
                        cubeN[j] *= n1;
                        cubeVertex[j] += offset1;
                     } else {
                        cubeN[j] *= n0;
                        cubeVertex[j] += offset0;
                     }
                  }

                  k *= size_i;
                  pos <<= 1;
               }

               var y = new Float64Array(n);
               for (var j = 0; j < n; ++j) {
                  // Sum all cube vertices' samples portions
                  var rj = 0;
                  for (var i = 0; i < cubeVertices; i++)
                     rj += samples[cubeVertex[i] + j] * cubeN[i];

                  // r_j' = Interpolate(r_j, 0, 2^BitsPerSample - 1,
                  //                    Decode_2j, Decode_2j+1)
                  rj = interpolate(rj, 0, 1, decode[j][0], decode[j][1]);

                  // y_j = min(max(r_j, range_2j), range_2j+1)
                  y[j] = Math.min(Math.max(rj, range[j][0]), range[j][1]);
               }

               return y;
            };
         },

         constructInterpolated: function PDFFunction_constructInterpolated(str,
                                                                           dict) {
            var c0 = dict.get('C0') || [0];
            var c1 = dict.get('C1') || [1];
            var n = dict.get('N');

            if (!isArray(c0) || !isArray(c1))
               error('Illegal dictionary for interpolated function');

            var length = c0.length;
            var diff = [];
            for (var i = 0; i < length; ++i)
               diff.push(c1[i] - c0[i]);

            return [CONSTRUCT_INTERPOLATED, c0, diff, n];
         },

         constructInterpolatedFromIR:
            function PDFFunction_constructInterpolatedFromIR(IR) {
               var c0 = IR[1];
               var diff = IR[2];
               var n = IR[3];

               var length = diff.length;

               return function constructInterpolatedFromIRResult(args) {
                  var x = n == 1 ? args[0] : Math.pow(args[0], n);

                  var out = [];
                  for (var j = 0; j < length; ++j)
                     out.push(c0[j] + (x * diff[j]));

                  return out;

               };
            },

         constructStiched: function PDFFunction_constructStiched(fn, dict, xref) {
            var domain = dict.get('Domain');

            if (!domain)
               error('No domain');

            var inputSize = domain.length / 2;
            if (inputSize != 1)
               error('Bad domain for stiched function');

            var fnRefs = dict.get('Functions');
            var fns = [];
            for (var i = 0, ii = fnRefs.length; i < ii; ++i)
               fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));

            var bounds = dict.get('Bounds');
            var encode = dict.get('Encode');

            return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
         },

         constructStichedFromIR: function PDFFunction_constructStichedFromIR(IR) {
            var domain = IR[1];
            var bounds = IR[2];
            var encode = IR[3];
            var fnsIR = IR[4];
            var fns = [];

            for (var i = 0, ii = fnsIR.length; i < ii; i++) {
               fns.push(PDFFunction.fromIR(fnsIR[i]));
            }

            return function constructStichedFromIRResult(args) {
               var clip = function constructStichedFromIRClip(v, min, max) {
                  if (v > max)
                     v = max;
                  else if (v < min)
                     v = min;
                  return v;
               };

               // clip to domain
               var v = clip(args[0], domain[0], domain[1]);
               // calulate which bound the value is in
               for (var i = 0, ii = bounds.length; i < ii; ++i) {
                  if (v < bounds[i])
                     break;
               }

               // encode value into domain of function
               var dmin = domain[0];
               if (i > 0)
                  dmin = bounds[i - 1];
               var dmax = domain[1];
               if (i < bounds.length)
                  dmax = bounds[i];

               var rmin = encode[2 * i];
               var rmax = encode[2 * i + 1];

               var v2 = rmin + (v - dmin) * (rmax - rmin) / (dmax - dmin);

               // call the appropropriate function
               return fns[i]([v2]);
            };
         },

         constructPostScript: function PDFFunction_constructPostScript(fn, dict,
                                                                       xref) {
            var domain = dict.get('Domain');
            var range = dict.get('Range');

            if (!domain)
               error('No domain.');

            if (!range)
               error('No range.');

            var lexer = new PostScriptLexer(fn);
            var parser = new PostScriptParser(lexer);
            var code = parser.parse();

            return [CONSTRUCT_POSTSCRIPT, domain, range, code];
         },

         constructPostScriptFromIR: function PDFFunction_constructPostScriptFromIR(
            IR) {
            var domain = IR[1];
            var range = IR[2];
            var code = IR[3];
            var numOutputs = range.length / 2;
            var evaluator = new PostScriptEvaluator(code);
            // Cache the values for a big speed up, the cache size is limited though
            // since the number of possible values can be huge from a PS function.
            var cache = new FunctionCache();
            return function constructPostScriptFromIRResult(args) {
               var initialStack = [];
               for (var i = 0, ii = (domain.length / 2); i < ii; ++i) {
                  initialStack.push(args[i]);
               }

               var key = initialStack.join('_');
               if (cache.has(key))
                  return cache.get(key);

               var stack = evaluator.execute(initialStack);
               var transformed = [];
               for (i = numOutputs - 1; i >= 0; --i) {
                  var out = stack.pop();
                  var rangeIndex = 2 * i;
                  if (out < range[rangeIndex])
                     out = range[rangeIndex];
                  else if (out > range[rangeIndex + 1])
                     out = range[rangeIndex + 1];
                  transformed[i] = out;
               }
               cache.set(key, transformed);
               return transformed;
            };
         }
      };
   })();

   var FunctionCache = (function FunctionCacheClosure() {
      // Of 10 PDF's with type4 functions the maxium number of distinct values seen
      // was 256. This still may need some tweaking in the future though.
      var MAX_CACHE_SIZE = 1024;
      function FunctionCache() {
         this.cache = {};
         this.total = 0;
      }
      FunctionCache.prototype = {
         has: function FunctionCache_has(key) {
            return key in this.cache;
         },
         get: function FunctionCache_get(key) {
            return this.cache[key];
         },
         set: function FunctionCache_set(key, value) {
            if (this.total < MAX_CACHE_SIZE) {
               this.cache[key] = value;
               this.total++;
            }
         }
      };
      return FunctionCache;
   })();

   var PostScriptStack = (function PostScriptStackClosure() {
      var MAX_STACK_SIZE = 100;
      function PostScriptStack(initialStack) {
         this.stack = initialStack || [];
      }

      PostScriptStack.prototype = {
         push: function PostScriptStack_push(value) {
            if (this.stack.length >= MAX_STACK_SIZE)
               error('PostScript function stack overflow.');
            this.stack.push(value);
         },
         pop: function PostScriptStack_pop() {
            if (this.stack.length <= 0)
               error('PostScript function stack underflow.');
            return this.stack.pop();
         },
         copy: function PostScriptStack_copy(n) {
            if (this.stack.length + n >= MAX_STACK_SIZE)
               error('PostScript function stack overflow.');
            var stack = this.stack;
            for (var i = stack.length - n, j = n - 1; j >= 0; j--, i++)
               stack.push(stack[i]);
         },
         index: function PostScriptStack_index(n) {
            this.push(this.stack[this.stack.length - n - 1]);
         },
         // rotate the last n stack elements p times
         roll: function PostScriptStack_roll(n, p) {
            var stack = this.stack;
            var l = stack.length - n;
            var r = stack.length - 1, c = l + (p - Math.floor(p / n) * n), i, j, t;
            for (i = l, j = r; i < j; i++, j--) {
               t = stack[i]; stack[i] = stack[j]; stack[j] = t;
            }
            for (i = l, j = c - 1; i < j; i++, j--) {
               t = stack[i]; stack[i] = stack[j]; stack[j] = t;
            }
            for (i = c, j = r; i < j; i++, j--) {
               t = stack[i]; stack[i] = stack[j]; stack[j] = t;
            }
         }
      };
      return PostScriptStack;
   })();
   var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
      function PostScriptEvaluator(operators, operands) {
         this.operators = operators;
         this.operands = operands;
      }
      PostScriptEvaluator.prototype = {
         execute: function PostScriptEvaluator_execute(initialStack) {
            var stack = new PostScriptStack(initialStack);
            var counter = 0;
            var operators = this.operators;
            var length = operators.length;
            var operator, a, b;
            while (counter < length) {
               operator = operators[counter++];
               if (typeof operator == 'number') {
                  // Operator is really an operand and should be pushed to the stack.
                  stack.push(operator);
                  continue;
               }
               switch (operator) {
                  // non standard ps operators
                  case 'jz': // jump if false
                     b = stack.pop();
                     a = stack.pop();
                     if (!a)
                        counter = b;
                     break;
                  case 'j': // jump
                     a = stack.pop();
                     counter = a;
                     break;

                  // all ps operators in alphabetical order (excluding if/ifelse)
                  case 'abs':
                     a = stack.pop();
                     stack.push(Math.abs(a));
                     break;
                  case 'add':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a + b);
                     break;
                  case 'and':
                     b = stack.pop();
                     a = stack.pop();
                     if (isBool(a) && isBool(b))
                        stack.push(a && b);
                     else
                        stack.push(a & b);
                     break;
                  case 'atan':
                     a = stack.pop();
                     stack.push(Math.atan(a));
                     break;
                  case 'bitshift':
                     b = stack.pop();
                     a = stack.pop();
                     if (a > 0)
                        stack.push(a << b);
                     else
                        stack.push(a >> b);
                     break;
                  case 'ceiling':
                     a = stack.pop();
                     stack.push(Math.ceil(a));
                     break;
                  case 'copy':
                     a = stack.pop();
                     stack.copy(a);
                     break;
                  case 'cos':
                     a = stack.pop();
                     stack.push(Math.cos(a));
                     break;
                  case 'cvi':
                     a = stack.pop() | 0;
                     stack.push(a);
                     break;
                  case 'cvr':
                     // noop
                     break;
                  case 'div':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a / b);
                     break;
                  case 'dup':
                     stack.copy(1);
                     break;
                  case 'eq':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a == b);
                     break;
                  case 'exch':
                     stack.roll(2, 1);
                     break;
                  case 'exp':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(Math.pow(a, b));
                     break;
                  case 'false':
                     stack.push(false);
                     break;
                  case 'floor':
                     a = stack.pop();
                     stack.push(Math.floor(a));
                     break;
                  case 'ge':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a >= b);
                     break;
                  case 'gt':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a > b);
                     break;
                  case 'idiv':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push((a / b) | 0);
                     break;
                  case 'index':
                     a = stack.pop();
                     stack.index(a);
                     break;
                  case 'le':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a <= b);
                     break;
                  case 'ln':
                     a = stack.pop();
                     stack.push(Math.log(a));
                     break;
                  case 'log':
                     a = stack.pop();
                     stack.push(Math.log(a) / Math.LN10);
                     break;
                  case 'lt':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a < b);
                     break;
                  case 'mod':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a % b);
                     break;
                  case 'mul':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a * b);
                     break;
                  case 'ne':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a != b);
                     break;
                  case 'neg':
                     a = stack.pop();
                     stack.push(-b);
                     break;
                  case 'not':
                     a = stack.pop();
                     if (isBool(a) && isBool(b))
                        stack.push(a && b);
                     else
                        stack.push(a & b);
                     break;
                  case 'or':
                     b = stack.pop();
                     a = stack.pop();
                     if (isBool(a) && isBool(b))
                        stack.push(a || b);
                     else
                        stack.push(a | b);
                     break;
                  case 'pop':
                     stack.pop();
                     break;
                  case 'roll':
                     b = stack.pop();
                     a = stack.pop();
                     stack.roll(a, b);
                     break;
                  case 'round':
                     a = stack.pop();
                     stack.push(Math.round(a));
                     break;
                  case 'sin':
                     a = stack.pop();
                     stack.push(Math.sin(a));
                     break;
                  case 'sqrt':
                     a = stack.pop();
                     stack.push(Math.sqrt(a));
                     break;
                  case 'sub':
                     b = stack.pop();
                     a = stack.pop();
                     stack.push(a - b);
                     break;
                  case 'true':
                     stack.push(true);
                     break;
                  case 'truncate':
                     a = stack.pop();
                     a = a < 0 ? Math.ceil(a) : Math.floor(a);
                     stack.push(a);
                     break;
                  case 'xor':
                     b = stack.pop();
                     a = stack.pop();
                     if (isBool(a) && isBool(b))
                        stack.push(a != b);
                     else
                        stack.push(a ^ b);
                     break;
                  default:
                     error('Unknown operator ' + operator);
                     break;
               }
            }
            return stack.stack;
         }
      };
      return PostScriptEvaluator;
   })();

   var PostScriptParser = (function PostScriptParserClosure() {
      function PostScriptParser(lexer) {
         this.lexer = lexer;
         this.operators = [];
         this.token = null;
         this.prev = null;
      }
      PostScriptParser.prototype = {
         nextToken: function PostScriptParser_nextToken() {
            this.prev = this.token;
            this.token = this.lexer.getToken();
         },
         accept: function PostScriptParser_accept(type) {
            if (this.token.type == type) {
               this.nextToken();
               return true;
            }
            return false;
         },
         expect: function PostScriptParser_expect(type) {
            if (this.accept(type))
               return true;
            error('Unexpected symbol: found ' + this.token.type + ' expected ' +
               type + '.');
         },
         parse: function PostScriptParser_parse() {
            this.nextToken();
            this.expect(PostScriptTokenTypes.LBRACE);
            this.parseBlock();
            this.expect(PostScriptTokenTypes.RBRACE);
            return this.operators;
         },
         parseBlock: function PostScriptParser_parseBlock() {
            while (true) {
               if (this.accept(PostScriptTokenTypes.NUMBER)) {
                  this.operators.push(this.prev.value);
               } else if (this.accept(PostScriptTokenTypes.OPERATOR)) {
                  this.operators.push(this.prev.value);
               } else if (this.accept(PostScriptTokenTypes.LBRACE)) {
                  this.parseCondition();
               } else {
                  return;
               }
            }
         },
         parseCondition: function PostScriptParser_parseCondition() {
            // Add two place holders that will be updated later
            var conditionLocation = this.operators.length;
            this.operators.push(null, null);

            this.parseBlock();
            this.expect(PostScriptTokenTypes.RBRACE);
            if (this.accept(PostScriptTokenTypes.IF)) {
               // The true block is right after the 'if' so it just falls through on
               // true else it jumps and skips the true block.
               this.operators[conditionLocation] = this.operators.length;
               this.operators[conditionLocation + 1] = 'jz';
            } else if (this.accept(PostScriptTokenTypes.LBRACE)) {
               var jumpLocation = this.operators.length;
               this.operators.push(null, null);
               var endOfTrue = this.operators.length;
               this.parseBlock();
               this.expect(PostScriptTokenTypes.RBRACE);
               this.expect(PostScriptTokenTypes.IFELSE);
               // The jump is added at the end of the true block to skip the false
               // block.
               this.operators[jumpLocation] = this.operators.length;
               this.operators[jumpLocation + 1] = 'j';

               this.operators[conditionLocation] = endOfTrue;
               this.operators[conditionLocation + 1] = 'jz';
            } else {
               error('PS Function: error parsing conditional.');
            }
         }
      };
      return PostScriptParser;
   })();

   var PostScriptTokenTypes = {
      LBRACE: 0,
      RBRACE: 1,
      NUMBER: 2,
      OPERATOR: 3,
      IF: 4,
      IFELSE: 5
   };

   var PostScriptToken = (function PostScriptTokenClosure() {
      function PostScriptToken(type, value) {
         this.type = type;
         this.value = value;
      }

      var opCache = {};

      PostScriptToken.getOperator = function PostScriptToken_getOperator(op) {
         var opValue = opCache[op];
         if (opValue)
            return opValue;

         return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op);
      };

      PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE,
         '{');
      PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE,
         '}');
      PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF');
      PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE,
         'IFELSE');
      return PostScriptToken;
   })();

   var PostScriptLexer = (function PostScriptLexerClosure() {
      function PostScriptLexer(stream) {
         this.stream = stream;
         this.nextChar();
      }
      PostScriptLexer.prototype = {
         nextChar: function PostScriptLexer_nextChar() {
            return (this.currentChar = this.stream.getByte());
         },
         getToken: function PostScriptLexer_getToken() {
            var s = '';
            var comment = false;
            var ch = this.currentChar;

            // skip comments
            while (true) {
               if (ch < 0) {
                  return EOF;
               }

               if (comment) {
                  if (ch === 0x0A || ch === 0x0D) {
                     comment = false;
                  }
               } else if (ch == 0x25) { // '%'
                  comment = true;
               } else if (!Lexer.isSpace(ch)) {
                  break;
               }
               ch = this.nextChar();
            }
            switch (ch | 0) {
               case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
               case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
               case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
               return new PostScriptToken(PostScriptTokenTypes.NUMBER,
                  this.getNumber());
               case 0x7B: // '{'
                  this.nextChar();
                  return PostScriptToken.LBRACE;
               case 0x7D: // '}'
                  this.nextChar();
                  return PostScriptToken.RBRACE;
            }
            // operator
            var str = String.fromCharCode(ch);
            while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
               ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
               str += String.fromCharCode(ch);
            }
            switch (str.toLowerCase()) {
               case 'if':
                  return PostScriptToken.IF;
               case 'ifelse':
                  return PostScriptToken.IFELSE;
               default:
                  return PostScriptToken.getOperator(str);
            }
         },
         getNumber: function PostScriptLexer_getNumber() {
            var ch = this.currentChar;
            var str = String.fromCharCode(ch);
            while ((ch = this.nextChar()) >= 0) {
               if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
                  ch === 0x2D || ch === 0x2E) { // '-', '.'
                  str += String.fromCharCode(ch);
               } else {
                  break;
               }
            }
            var value = parseFloat(str);
            if (isNaN(value))
               error('Invalid floating point number: ' + value);
            return value;
         }
      };
      return PostScriptLexer;
   })();



   var Annotation = (function AnnotationClosure() {
      // 12.5.5: Algorithm: Appearance streams
      function getTransformMatrix(rect, bbox, matrix) {
         var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix);
         var minX = bounds[0];
         var minY = bounds[1];
         var maxX = bounds[2];
         var maxY = bounds[3];

         if (minX === maxX || minY === maxY) {
            // From real-life file, bbox was [0, 0, 0, 0]. In this case,
            // just apply the transform for rect
            return [1, 0, 0, 1, rect[0], rect[1]];
         }

         var xRatio = (rect[2] - rect[0]) / (maxX - minX);
         var yRatio = (rect[3] - rect[1]) / (maxY - minY);
         return [
            xRatio,
            0,
            0,
            yRatio,
            rect[0] - minX * xRatio,
            rect[1] - minY * yRatio
         ];
      }

      function getDefaultAppearance(dict) {
         var appearanceState = dict.get('AP');
         if (!isDict(appearanceState)) {
            return;
         }

         var appearance;
         var appearances = appearanceState.get('N');
         if (isDict(appearances)) {
            var as = dict.get('AS');
            if (as && appearances.has(as.name)) {
               appearance = appearances.get(as.name);
            }
         } else {
            appearance = appearances;
         }
         return appearance;
      }

      function Annotation(params) {
         if (params.data) {
            this.data = params.data;
            return;
         }

         var dict = params.dict;
         var data = this.data = {};

         data.subtype = dict.get('Subtype').name;
         var rect = dict.get('Rect');
         data.rect = Util.normalizeRect(rect);
         data.annotationFlags = dict.get('F');

         var color = dict.get('C');
         if (isArray(color) && color.length === 3) {
            // TODO(mack): currently only supporting rgb; need support different
            // colorspaces
            data.color = color;
         } else {
            data.color = [0, 0, 0];
         }

         // Some types of annotations have border style dict which has more
         // info than the border array
         if (dict.has('BS')) {
            var borderStyle = dict.get('BS');
            data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1;
         } else {
            var borderArray = dict.get('Border') || [0, 0, 1];
            data.borderWidth = borderArray[2] || 0;
         }

         this.appearance = getDefaultAppearance(dict);
         data.hasAppearance = !!this.appearance;
      }

      Annotation.prototype = {

         getData: function Annotation_getData() {
            return this.data;
         },

         hasHtml: function Annotation_hasHtml() {
            return false;
         },

         getHtmlElement: function Annotation_getHtmlElement(commonObjs) {
            throw new NotImplementedException(
               'getHtmlElement() should be implemented in subclass');
         },

         // TODO(mack): Remove this, it's not really that helpful.
         getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect) {
            assert(!isWorker,
               'getEmptyContainer() should be called from main thread');

            rect = rect || this.data.rect;
            var element = document.createElement(tagName);
            element.style.width = Math.ceil(rect[2] - rect[0]) + 'px';
            element.style.height = Math.ceil(rect[3] - rect[1]) + 'px';
            return element;
         },

         isViewable: function Annotation_isViewable() {
            var data = this.data;
            return !!(
               data &&
                  (!data.annotationFlags ||
                     !(data.annotationFlags & 0x22)) && // Hidden or NoView
                  data.rect                            // rectangle is nessessary
               );
         },

         loadResources: function(keys) {
            var promise = new Promise();
            this.appearance.dict.getAsync('Resources').then(function(resources) {
               if (!resources) {
                  promise.resolve();
                  return;
               }
               var objectLoader = new ObjectLoader(resources.map,
                  keys,
                  resources.xref);
               objectLoader.load().then(function() {
                  promise.resolve(resources);
               });
            }.bind(this));

            return promise;
         },

         getOperatorList: function Annotation_getToOperatorList(evaluator) {

            var promise = new Promise();

            if (!this.appearance) {
               promise.resolve(new OperatorList());
               return promise;
            }

            var data = this.data;

            var appearanceDict = this.appearance.dict;
            var resourcesPromise = this.loadResources([
               'ExtGState',
               'ColorSpace',
               'Pattern',
               'Shading',
               'XObject',
               'Font'
               // ProcSet
               // Properties
            ]);
            var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1];
            var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0];
            var transform = getTransformMatrix(data.rect, bbox, matrix);

            var border = data.border;

            resourcesPromise.then(function(resources) {
               var opList = new OperatorList();
               opList.addOp('beginAnnotation', [data.rect, transform, matrix]);
               evaluator.getOperatorList(this.appearance, resources, opList);
               opList.addOp('endAnnotation', []);
               promise.resolve(opList);
            }.bind(this));

            return promise;
         }
      };

      Annotation.getConstructor =
         function Annotation_getConstructor(subtype, fieldType) {

            if (!subtype) {
               return;
            }

            // TODO(mack): Implement FreeText annotations
            if (subtype === 'Link') {
               return LinkAnnotation;
            } else if (subtype === 'Text') {
               return TextAnnotation;
            } else if (subtype === 'Widget') {
               if (!fieldType) {
                  return;
               }

               if (fieldType === 'Tx') {
                  return TextWidgetAnnotation;
               } else {
                  return WidgetAnnotation;
               }
            } else {
               return Annotation;
            }
         };

      // TODO(mack): Support loading annotation from data
      Annotation.fromData = function Annotation_fromData(data) {
         var subtype = data.subtype;
         var fieldType = data.fieldType;
         var Constructor = Annotation.getConstructor(subtype, fieldType);
         if (Constructor) {
            return new Constructor({ data: data });
         }
      };

      Annotation.fromRef = function Annotation_fromRef(xref, ref) {

         var dict = xref.fetchIfRef(ref);
         if (!isDict(dict)) {
            return;
         }

         var subtype = dict.get('Subtype');
         subtype = isName(subtype) ? subtype.name : '';
         if (!subtype) {
            return;
         }

         var fieldType = Util.getInheritableProperty(dict, 'FT');
         fieldType = isName(fieldType) ? fieldType.name : '';

         var Constructor = Annotation.getConstructor(subtype, fieldType);
         if (!Constructor) {
            return;
         }

         var params = {
            dict: dict,
            ref: ref,
         };

         var annotation = new Constructor(params);

         if (annotation.isViewable()) {
            return annotation;
         } else {
            TODO('unimplemented annotation type: ' + subtype);
         }
      };

      Annotation.appendToOperatorList = function Annotation_appendToOperatorList(
         annotations, opList, pdfManager, partialEvaluator) {

         function reject(e) {
            annotationsReadyPromise.reject(e);
         }

         var annotationsReadyPromise = new Promise();

         var annotationPromises = [];
         for (var i = 0, n = annotations.length; i < n; ++i) {
            annotationPromises.push(annotations[i].getOperatorList(partialEvaluator));
         }
         Promise.all(annotationPromises).then(function(datas) {
            opList.addOp('beginAnnotations', []);
            for (var i = 0, n = datas.length; i < n; ++i) {
               var annotOpList = datas[i];
               opList.addOpList(annotOpList);
            }
            opList.addOp('endAnnotations', []);
            annotationsReadyPromise.resolve();
         }, reject);

         return annotationsReadyPromise;
      };

      return Annotation;
   })();
   PDFJS.Annotation = Annotation;


   var WidgetAnnotation = (function WidgetAnnotationClosure() {

      function WidgetAnnotation(params) {
         Annotation.call(this, params);

         if (params.data) {
            return;
         }

         var dict = params.dict;
         var data = this.data;

         data.fieldValue = stringToPDFString(
            Util.getInheritableProperty(dict, 'V') || '');
         data.alternativeText = stringToPDFString(dict.get('TU') || '');
         data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || '';
         var fieldType = Util.getInheritableProperty(dict, 'FT');
         data.fieldType = isName(fieldType) ? fieldType.name : '';
         data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0;
         this.fieldResources = Util.getInheritableProperty(dict, 'DR') || new Dict();

         // Building the full field name by collecting the field and
         // its ancestors 'T' data and joining them using '.'.
         var fieldName = [];
         var namedItem = dict;
         var ref = params.ref;
         while (namedItem) {
            var parent = namedItem.get('Parent');
            var parentRef = namedItem.getRaw('Parent');
            var name = namedItem.get('T');
            if (name) {
               fieldName.unshift(stringToPDFString(name));
            } else {
               // The field name is absent, that means more than one field
               // with the same name may exist. Replacing the empty name
               // with the '`' plus index in the parent's 'Kids' array.
               // This is not in the PDF spec but necessary to id the
               // the input controls.
               var kids = parent.get('Kids');
               var j, jj;
               for (j = 0, jj = kids.length; j < jj; j++) {
                  var kidRef = kids[j];
                  if (kidRef.num == ref.num && kidRef.gen == ref.gen)
                     break;
               }
               fieldName.unshift('`' + j);
            }
            namedItem = parent;
            ref = parentRef;
         }
         data.fullName = fieldName.join('.');
      }

      var parent = Annotation.prototype;
      Util.inherit(WidgetAnnotation, Annotation, {
         isViewable: function WidgetAnnotation_isViewable() {
            if (this.data.fieldType === 'Sig') {
               TODO('unimplemented annotation type: Widget signature');
               return false;
            }

            return parent.isViewable.call(this);
         }
      });

      return WidgetAnnotation;
   })();

   var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() {
      function TextWidgetAnnotation(params) {
         WidgetAnnotation.call(this, params);

         if (params.data) {
            return;
         }

         this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q');
      }

      // TODO(mack): This dupes some of the logic in CanvasGraphics.setFont()
      function setTextStyles(element, item, fontObj) {

         var style = element.style;
         style.fontSize = item.fontSize + 'px';
         style.direction = item.fontDirection < 0 ? 'rtl': 'ltr';

         if (!fontObj) {
            return;
         }

         style.fontWeight = fontObj.black ?
            (fontObj.bold ? 'bolder' : 'bold') :
            (fontObj.bold ? 'bold' : 'normal');
         style.fontStyle = fontObj.italic ? 'italic' : 'normal';

         var fontName = fontObj.loadedName;
         var fontFamily = fontName ? '"' + fontName + '", ' : '';
         // Use a reasonable default font if the font doesn't specify a fallback
         var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif';
         style.fontFamily = fontFamily + fallbackName;
      }


      var parent = WidgetAnnotation.prototype;
      Util.inherit(TextWidgetAnnotation, WidgetAnnotation, {
         hasHtml: function TextWidgetAnnotation_hasHtml() {
            return !this.data.hasAppearance && !!this.data.fieldValue;
         },

         getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) {
            assert(!isWorker, 'getHtmlElement() shall be called from main thread');

            var item = this.data;

            var element = this.getEmptyContainer('div');
            element.style.display = 'table';

            var content = document.createElement('div');
            content.textContent = item.fieldValue;
            var textAlignment = item.textAlignment;
            content.style.textAlign = ['left', 'center', 'right'][textAlignment];
            content.style.verticalAlign = 'middle';
            content.style.display = 'table-cell';

            var fontObj = item.fontRefName ?
               commonObjs.getData(item.fontRefName) : null;
            var cssRules = setTextStyles(content, item, fontObj);

            element.appendChild(content);

            return element;
         },

         getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) {
            if (this.appearance) {
               return Annotation.prototype.getOperatorList.call(this, evaluator);
            }

            var promise = new Promise();
            var opList = new OperatorList();
            var data = this.data;

            // Even if there is an appearance stream, ignore it. This is the
            // behaviour used by Adobe Reader.

            var defaultAppearance = data.defaultAppearance;
            if (!defaultAppearance) {
               promise.resolve(opList);
               return promise;
            }

            // Include any font resources found in the default appearance

            var stream = new Stream(stringToBytes(defaultAppearance));
            evaluator.getOperatorList(stream, this.fieldResources, opList);
            var appearanceFnArray = opList.fnArray;
            var appearanceArgsArray = opList.argsArray;
            var fnArray = [];
            var argsArray = [];

            // TODO(mack): Add support for stroke color
            data.rgb = [0, 0, 0];
            // TODO THIS DOESN'T MAKE ANY SENSE SINCE THE fnArray IS EMPTY!
            for (var i = 0, n = fnArray.length; i < n; ++i) {
               var fnName = appearanceFnArray[i];
               var args = appearanceArgsArray[i];

               if (fnName === 'setFont') {
                  data.fontRefName = args[0];
                  var size = args[1];
                  if (size < 0) {
                     data.fontDirection = -1;
                     data.fontSize = -size;
                  } else {
                     data.fontDirection = 1;
                     data.fontSize = size;
                  }
               } else if (fnName === 'setFillRGBColor') {
                  data.rgb = args;
               } else if (fnName === 'setFillGray') {
                  var rgbValue = args[0] * 255;
                  data.rgb = [rgbValue, rgbValue, rgbValue];
               }
            }
            promise.resolve(opList);
            return promise;
         }
      });

      return TextWidgetAnnotation;
   })();

   var TextAnnotation = (function TextAnnotationClosure() {
      function TextAnnotation(params) {
         Annotation.call(this, params);

         if (params.data) {
            return;
         }

         var dict = params.dict;
         var data = this.data;

         var content = dict.get('Contents');
         var title = dict.get('T');
         data.content = stringToPDFString(content || '');
         data.title = stringToPDFString(title || '');
         data.name = !dict.has('Name') ? 'Note' : dict.get('Name').name;
      }

      var ANNOT_MIN_SIZE = 10;

      Util.inherit(TextAnnotation, Annotation, {

         getOperatorList: function TextAnnotation_getOperatorList(evaluator) {
            var promise = new Promise();
            promise.resolve(new OperatorList());
            return promise;
         },

         hasHtml: function TextAnnotation_hasHtml() {
            return true;
         },

         getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) {
            assert(!isWorker, 'getHtmlElement() shall be called from main thread');

            var item = this.data;
            var rect = item.rect;

            // sanity check because of OOo-generated PDFs
            if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
               rect[3] = rect[1] + ANNOT_MIN_SIZE;
            }
            if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
               rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
            }

            var container = this.getEmptyContainer('section', rect);
            container.className = 'annotText';

            var image = document.createElement('img');
            image.style.height = container.style.height;
            var iconName = item.name;
            image.src = PDFJS.imageResourcesPath + 'annotation-' +
               iconName.toLowerCase() + '.svg';
            image.alt = '[{{type}} Annotation]';
            image.dataset.l10nId = 'text_annotation_type';
            image.dataset.l10nArgs = JSON.stringify({type: iconName});
            var content = document.createElement('div');
            content.setAttribute('hidden', true);
            var title = document.createElement('h1');
            var text = document.createElement('p');
            content.style.left = Math.floor(rect[2] - rect[0]) + 'px';
            content.style.top = '0px';
            title.textContent = item.title;

            if (!item.content && !item.title) {
               content.setAttribute('hidden', true);
            } else {
               var e = document.createElement('span');
               var lines = item.content.split(/(?:\r\n?|\n)/);
               for (var i = 0, ii = lines.length; i < ii; ++i) {
                  var line = lines[i];
                  e.appendChild(document.createTextNode(line));
                  if (i < (ii - 1))
                     e.appendChild(document.createElement('br'));
               }
               text.appendChild(e);

               var showAnnotation = function showAnnotation() {
                  container.style.zIndex += 1;
                  content.removeAttribute('hidden');
               };

               var hideAnnotation = function hideAnnotation(e) {
                  if (e.toElement || e.relatedTarget) { // No context menu is used
                     container.style.zIndex -= 1;
                     content.setAttribute('hidden', true);
                  }
               };

               content.addEventListener('mouseover', showAnnotation, false);
               content.addEventListener('mouseout', hideAnnotation, false);
               image.addEventListener('mouseover', showAnnotation, false);
               image.addEventListener('mouseout', hideAnnotation, false);
            }

            content.appendChild(title);
            content.appendChild(text);
            container.appendChild(image);
            container.appendChild(content);

            return container;
         }
      });

      return TextAnnotation;
   })();

   var LinkAnnotation = (function LinkAnnotationClosure() {
      function LinkAnnotation(params) {
         Annotation.call(this, params);

         if (params.data) {
            return;
         }

         var dict = params.dict;
         var data = this.data;

         var action = dict.get('A');
         if (action) {
            var linkType = action.get('S').name;
            if (linkType === 'URI') {
               var url = action.get('URI');
               // TODO: pdf spec mentions urls can be relative to a Base
               // entry in the dictionary.
               if (!isValidUrl(url, false)) {
                  url = '';
               }
               data.url = url;
            } else if (linkType === 'GoTo') {
               data.dest = action.get('D');
            } else if (linkType === 'GoToR') {
               var urlDict = action.get('F');
               if (isDict(urlDict)) {
                  // We assume that the 'url' is a Filspec dictionary
                  // and fetch the url without checking any further
                  url = urlDict.get('F') || '';
               }

               // TODO: pdf reference says that GoToR
               // can also have 'NewWindow' attribute
               if (!isValidUrl(url, false)) {
                  url = '';
               }
               data.url = url;
               data.dest = action.get('D');
            } else if (linkType === 'Named') {
               data.action = action.get('N').name;
            } else {
               TODO('unrecognized link type: ' + linkType);
            }
         } else if (dict.has('Dest')) {
            // simple destination link
            var dest = dict.get('Dest');
            data.dest = isName(dest) ? dest.name : dest;
         }
      }

      Util.inherit(LinkAnnotation, Annotation, {
         hasOperatorList: function LinkAnnotation_hasOperatorList() {
            return false;
         },

         hasHtml: function LinkAnnotation_hasHtml() {
            return true;
         },

         getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) {
            var rect = this.data.rect;
            var element = document.createElement('a');
            var borderWidth = this.data.borderWidth;

            element.style.borderWidth = borderWidth + 'px';
            var color = this.data.color;
            var rgb = [];
            for (var i = 0; i < 3; ++i) {
               rgb[i] = Math.round(color[i] * 255);
            }
            element.style.borderColor = Util.makeCssRgb(rgb);
            element.style.borderStyle = 'solid';

            var width = rect[2] - rect[0] - 2 * borderWidth;
            var height = rect[3] - rect[1] - 2 * borderWidth;
            element.style.width = width + 'px';
            element.style.height = height + 'px';

            element.href = this.data.url || '';
            return element;
         }
      });

      return LinkAnnotation;
   })();


   /**
    * The maximum allowed image size in total pixels e.g. width * height. Images
    * above this value will not be drawn. Use -1 for no limit.
    * @var {Number}
    */
   PDFJS.maxImageSize = PDFJS.maxImageSize === undefined ? -1 : PDFJS.maxImageSize;

   /**
    * By default fonts are converted to OpenType fonts and loaded via font face
    * rules. If disabled, the font will be rendered using a built in font renderer
    * that constructs the glyphs with primitive path commands.
    * @var {Boolean}
    */
   PDFJS.disableFontFace = PDFJS.disableFontFace === undefined ?
      false :
      PDFJS.disableFontFace;

   /**
    * This is the main entry point for loading a PDF and interacting with it.
    * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
    * is used, which means it must follow the same origin rules that any XHR does
    * e.g. No cross domain requests without CORS.
    *
    * @param {string|TypedAray|object} source Can be an url to where a PDF is
    * located, a typed array (Uint8Array) already populated with data or
    * and parameter object with the following possible fields:
    *  - url   - The URL of the PDF.
    *  - data  - A typed array with PDF data.
    *  - httpHeaders - Basic authentication headers.
    *  - password - For decrypting password-protected PDFs.
    *
    * @param {object} pdfDataRangeTransport is optional. It is used if you want
    * to manually serve range requests for data in the PDF. See viewer.js for
    * an example of pdfDataRangeTransport's interface.
    *
    * @param {function} passwordCallback is optional. It is used to request a
    * password if wrong or no password was provided. The callback receives two
    * parameters: function that needs to be called with new password and reason
    * (see {PasswordResponses}).
    *
    * @return {Promise} A promise that is resolved with {PDFDocumentProxy} object.
    */
   PDFJS.getDocument = function getDocument(source,
                                            pdfDataRangeTransport,
                                            passwordCallback,
                                            progressCallback) {
      var workerInitializedPromise, workerReadyPromise, transport;

      if (typeof source === 'string') {
         source = { url: source };
      } else if (isArrayBuffer(source)) {
         source = { data: source };
      } else if (typeof source !== 'object') {
         error('Invalid parameter in getDocument, need either Uint8Array, ' +
            'string or a parameter object');
      }

      if (!source.url && !source.data)
         error('Invalid parameter array, need either .data or .url');

      // copy/use all keys as is except 'url' -- full path is required
      var params = {};
      for (var key in source) {
         if (key === 'url' && typeof window !== 'undefined') {
            params[key] = combineUrl(window.location.href, source[key]);
            continue;
         }
         params[key] = source[key];
      }

      workerInitializedPromise = new PDFJS.Promise();
      workerReadyPromise = new PDFJS.Promise();
      transport = new WorkerTransport(workerInitializedPromise,
         workerReadyPromise, pdfDataRangeTransport, progressCallback);
      workerInitializedPromise.then(function transportInitialized() {
         transport.passwordCallback = passwordCallback;
         transport.fetchDocument(params);
      });
      return workerReadyPromise;
   };

   /**
    * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
    * properties that can be read synchronously.
    */
   var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
      function PDFDocumentProxy(pdfInfo, transport) {
         this.pdfInfo = pdfInfo;
         this.transport = transport;
      }
      PDFDocumentProxy.prototype = {
         /**
          * @return {number} Total number of pages the PDF contains.
          */
         get numPages() {
            return this.pdfInfo.numPages;
         },
         /**
          * @return {string} A unique ID to identify a PDF. Not guaranteed to be
          * unique.
          */
         get fingerprint() {
            return this.pdfInfo.fingerprint;
         },
         /**
          * @return {boolean} true if embedded document fonts are in use. Will be
          * set during rendering of the pages.
          */
         get embeddedFontsUsed() {
            return this.transport.embeddedFontsUsed;
         },
         /**
          * @param {number} The page number to get. The first page is 1.
          * @return {Promise} A promise that is resolved with a {PDFPageProxy}
          * object.
          */
         getPage: function PDFDocumentProxy_getPage(number) {
            return this.transport.getPage(number);
         },
         /**
          * @return {Promise} A promise that is resolved with a lookup table for
          * mapping named destinations to reference numbers.
          */
         getDestinations: function PDFDocumentProxy_getDestinations() {
            return this.transport.getDestinations();
         },
         /**
          * @return {Promise} A promise that is resolved with an array of all the
          * JavaScript strings in the name tree.
          */
         getJavaScript: function PDFDocumentProxy_getDestinations() {
            var promise = new PDFJS.Promise();
            var js = this.pdfInfo.javaScript;
            promise.resolve(js);
            return promise;
         },
         /**
          * @return {Promise} A promise that is resolved with an {array} that is a
          * tree outline (if it has one) of the PDF. The tree is in the format of:
          * [
          *  {
     *   title: string,
     *   bold: boolean,
     *   italic: boolean,
     *   color: rgb array,
     *   dest: dest obj,
     *   items: array of more items like this
     *  },
          *  ...
          * ].
          */
         getOutline: function PDFDocumentProxy_getOutline() {
            var promise = new PDFJS.Promise();
            var outline = this.pdfInfo.outline;
            promise.resolve(outline);
            return promise;
         },
         /**
          * @return {Promise} A promise that is resolved with an {object} that has
          * info and metadata properties.  Info is an {object} filled with anything
          * available in the information dictionary and similarly metadata is a
          * {Metadata} object with information from the metadata section of the PDF.
          */
         getMetadata: function PDFDocumentProxy_getMetadata() {
            var promise = new PDFJS.Promise();
            var info = this.pdfInfo.info;
            var metadata = this.pdfInfo.metadata;
            promise.resolve({
               info: info,
               metadata: metadata ? new PDFJS.Metadata(metadata) : null
            });
            return promise;
         },
         isEncrypted: function PDFDocumentProxy_isEncrypted() {
            var promise = new PDFJS.Promise();
            promise.resolve(this.pdfInfo.encrypted);
            return promise;
         },
         /**
          * @return {Promise} A promise that is resolved with a TypedArray that has
          * the raw data from the PDF.
          */
         getData: function PDFDocumentProxy_getData() {
            var promise = new PDFJS.Promise();
            this.transport.getData(promise);
            return promise;
         },
         /**
          * @return {Promise} A promise that is resolved when the document's data
          * is loaded
          */
         dataLoaded: function PDFDocumentProxy_dataLoaded() {
            return this.transport.dataLoaded();
         },
         destroy: function PDFDocumentProxy_destroy() {
            this.transport.destroy();
         }
      };
      return PDFDocumentProxy;
   })();

   var PDFPageProxy = (function PDFPageProxyClosure() {
      function PDFPageProxy(pageInfo, transport) {
         this.pageInfo = pageInfo;
         this.transport = transport;
         this.stats = new StatTimer();
         this.stats.enabled = !!globalScope.PDFJS.enableStats;
         this.commonObjs = transport.commonObjs;
         this.objs = new PDFObjects();
         this.receivingOperatorList  = false;
         this.cleanupAfterRender = false;
         this.pendingDestroy = false;
         this.renderTasks = [];
      }
      PDFPageProxy.prototype = {
         /**
          * @return {number} Page number of the page. First page is 1.
          */
         get pageNumber() {
            return this.pageInfo.pageIndex + 1;
         },
         /**
          * @return {number} The number of degrees the page is rotated clockwise.
          */
         get rotate() {
            return this.pageInfo.rotate;
         },
         /**
          * @return {object} The reference that points to this page. It has 'num' and
          * 'gen' properties.
          */
         get ref() {
            return this.pageInfo.ref;
         },
         /**
          * @return {array} An array of the visible portion of the PDF page in the
          * user space units - [x1, y1, x2, y2].
          */
         get view() {
            return this.pageInfo.view;
         },
         /**
          * @param {number} scale The desired scale of the viewport.
          * @param {number} rotate Degrees to rotate the viewport. If omitted this
          * defaults to the page rotation.
          * @return {PageViewport} Contains 'width' and 'height' properties along
          * with transforms required for rendering.
          */
         getViewport: function PDFPageProxy_getViewport(scale, rotate) {
            if (arguments.length < 2)
               rotate = this.rotate;
            return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
         },
         /**
          * @return {Promise} A promise that is resolved with an {array} of the
          * annotation objects.
          */
         getAnnotations: function PDFPageProxy_getAnnotations() {
            if (this.annotationsPromise)
               return this.annotationsPromise;

            var promise = new PDFJS.Promise();
            this.annotationsPromise = promise;
            this.transport.getAnnotations(this.pageInfo.pageIndex);
            return promise;
         },
         /**
          * Begins the process of rendering a page to the desired context.
          * @param {object} params A parameter object that supports:
          * {
     *   canvasContext(required): A 2D context of a DOM Canvas object.,
     *   textLayer(optional): An object that has beginLayout, endLayout, and
     *                        appendText functions.,
     *   imageLayer(optional): An object that has beginLayout, endLayout and
     *                         appendImage functions.,
     *   continueCallback(optional): A function that will be called each time
     *                               the rendering is paused.  To continue
     *                               rendering call the function that is the
     *                               first argument to the callback.
     * }.
          * @return {RenderTask} An extended promise that is resolved when the page
          * finishes rendering (see RenderTask).
          */
         render: function PDFPageProxy_render(params) {
            var stats = this.stats;
            stats.time('Overall');

            // If there was a pending destroy cancel it so no cleanup happens during
            // this call to render.
            this.pendingDestroy = false;

            // If there is no displayReadyPromise yet, then the operatorList was never
            // requested before. Make the request and create the promise.
            if (!this.displayReadyPromise) {
               this.receivingOperatorList = true;
               this.displayReadyPromise = new Promise();
               this.operatorList = {
                  fnArray: [],
                  argsArray: [],
                  lastChunk: false
               };

               this.stats.time('Page Request');
               this.transport.messageHandler.send('RenderPageRequest', {
                  pageIndex: this.pageNumber - 1
               });
            }

            var internalRenderTask = new InternalRenderTask(complete, params,
               this.objs, this.commonObjs,
               this.operatorList, this.pageNumber);
            this.renderTasks.push(internalRenderTask);
            var renderTask = new RenderTask(internalRenderTask);

            var self = this;
            this.displayReadyPromise.then(
               function pageDisplayReadyPromise(transparency) {
                  if (self.pendingDestroy) {
                     complete();
                     return;
                  }
                  stats.time('Rendering');
                  internalRenderTask.initalizeGraphics(transparency);
                  internalRenderTask.operatorListChanged();
               },
               function pageDisplayReadPromiseError(reason) {
                  complete(reason);
               }
            );

            function complete(error) {
               var i = self.renderTasks.indexOf(internalRenderTask);
               if (i >= 0) {
                  self.renderTasks.splice(i, 1);
               }

               if (self.cleanupAfterRender) {
                  self.pendingDestroy = true;
               }
               self._tryDestroy();

               if (error) {
                  renderTask.reject(error);
               } else {
                  renderTask.resolve();
               }
               stats.timeEnd('Rendering');
               stats.timeEnd('Overall');
            }

            return renderTask;
         },
         /**
          * @return {Promise} That is resolved with the a {string} that is the text
          * content from the page.
          */
         getTextContent: function PDFPageProxy_getTextContent() {
            var promise = new PDFJS.Promise();
            this.transport.messageHandler.send('GetTextContent', {
                  pageIndex: this.pageNumber - 1
               },
               function textContentCallback(textContent) {
                  promise.resolve(textContent);
               }
            );
            return promise;
         },
         /**
          * Stub for future feature.
          */
         getOperationList: function PDFPageProxy_getOperationList() {
            var promise = new PDFJS.Promise();
            var operationList = { // not implemented
               dependencyFontsID: null,
               operatorList: null
            };
            promise.resolve(operationList);
            return promise;
         },
         /**
          * Destroys resources allocated by the page.
          */
         destroy: function PDFPageProxy_destroy() {
            this.pendingDestroy = true;
            this._tryDestroy();
         },
         /**
          * For internal use only. Attempts to clean up if rendering is in a state
          * where that's possible.
          */
         _tryDestroy: function PDFPageProxy__destroy() {
            if (!this.pendingDestroy ||
               this.renderTasks.length !== 0 ||
               this.receivingOperatorList) {
               return;
            }

            delete this.operatorList;
            delete this.displayReadyPromise;
            this.objs.clear();
            this.pendingDestroy = false;
         },
         /**
          * For internal use only.
          */
         _startRenderPage: function PDFPageProxy_startRenderPage(transparency) {
            this.displayReadyPromise.resolve(transparency);
         },
         /**
          * For internal use only.
          */
         _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk) {
            // Add the new chunk to the current operator list.
            Util.concatenateToArray(this.operatorList.fnArray,
               operatorListChunk.fnArray);
            Util.concatenateToArray(this.operatorList.argsArray,
               operatorListChunk.argsArray);
            this.operatorList.lastChunk = operatorListChunk.lastChunk;

            // Notify all the rendering tasks there are more operators to be consumed.
            for (var i = 0; i < this.renderTasks.length; i++) {
               this.renderTasks[i].operatorListChanged();
            }

            if (operatorListChunk.lastChunk) {
               this.receivingOperatorList = false;
               this._tryDestroy();
            }
         }
      };
      return PDFPageProxy;
   })();
   /**
    * For internal use only.
    */
   var WorkerTransport = (function WorkerTransportClosure() {
      function WorkerTransport(workerInitializedPromise, workerReadyPromise,
                               pdfDataRangeTransport, progressCallback) {
         this.pdfDataRangeTransport = pdfDataRangeTransport;

         this.workerReadyPromise = workerReadyPromise;
         this.progressCallback = progressCallback;
         this.commonObjs = new PDFObjects();

         this.pageCache = [];
         this.pagePromises = [];
         this.embeddedFontsUsed = false;

         this.passwordCallback = null;

         // If worker support isn't disabled explicit and the browser has worker
         // support, create a new web worker and test if it/the browser fullfills
         // all requirements to run parts of pdf.js in a web worker.
         // Right now, the requirement is, that an Uint8Array is still an Uint8Array
         // as it arrives on the worker. Chrome added this with version 15.
         if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
            var workerSrc = PDFJS.workerSrc;
            if (typeof workerSrc === 'undefined') {
               error('No PDFJS.workerSrc specified');
            }

            try {
               // Some versions of FF can't create a worker on localhost, see:
               // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
               var worker = new Worker(workerSrc);
               var messageHandler = new MessageHandler('main', worker);
               this.messageHandler = messageHandler;

               messageHandler.on('test', function transportTest(supportTypedArray) {
                  if (supportTypedArray) {
                     this.worker = worker;
                     this.setupMessageHandler(messageHandler);
                  } else {
                     globalScope.PDFJS.disableWorker = true;
                     this.setupFakeWorker();
                  }
                  workerInitializedPromise.resolve();
               }.bind(this));

               var testObj = new Uint8Array(1);
               // Some versions of Opera throw a DATA_CLONE_ERR on
               // serializing the typed array.
               messageHandler.send('test', testObj);
               return;
            } catch (e) {
               info('The worker has been disabled.');
            }
         }
         // Either workers are disabled, not supported or have thrown an exception.
         // Thus, we fallback to a faked worker.
         globalScope.PDFJS.disableWorker = true;
         this.loadFakeWorkerFiles().then(function() {
            this.setupFakeWorker();
            workerInitializedPromise.resolve();
         }.bind(this));
      }
      WorkerTransport.prototype = {
         destroy: function WorkerTransport_destroy() {
            this.pageCache = [];
            this.pagePromises = [];
            var self = this;
            this.messageHandler.send('Terminate', null, function () {
               if (self.worker) {
                  self.worker.terminate();
               }
            });
         },

         loadFakeWorkerFiles: function WorkerTransport_loadFakeWorkerFiles() {
            if (!PDFJS.fakeWorkerFilesLoadedPromise) {
               PDFJS.fakeWorkerFilesLoadedPromise = new Promise();
               // In the developer build load worker_loader which in turn loads all the
               // other files and resolves the promise. In production only the
               // pdf.worker.js file is needed.
//#if !PRODUCTION
               Util.loadScript(PDFJS.workerSrc);
//#else
//      Util.loadScript(PDFJS.workerSrc, function() {
//        PDFJS.fakeWorkerFilesLoadedPromise.resolve();
//      });
//#endif
            }
            return PDFJS.fakeWorkerFilesLoadedPromise;
         },

         setupFakeWorker: function WorkerTransport_setupFakeWorker() {
            warn('Setting up fake worker.');
            // If we don't use a worker, just post/sendMessage to the main thread.
            var fakeWorker = {
               postMessage: function WorkerTransport_postMessage(obj) {
                  fakeWorker.onmessage({data: obj});
               },
               terminate: function WorkerTransport_terminate() {}
            };

            var messageHandler = new MessageHandler('main', fakeWorker);
            this.setupMessageHandler(messageHandler);

            // If the main thread is our worker, setup the handling for the messages
            // the main thread sends to it self.
            PDFJS.WorkerMessageHandler.setup(messageHandler);
         },

         setupMessageHandler:
            function WorkerTransport_setupMessageHandler(messageHandler) {
               this.messageHandler = messageHandler;

               function updatePassword(password) {
                  messageHandler.send('UpdatePassword', password);
               }

               var pdfDataRangeTransport = this.pdfDataRangeTransport;
               if (pdfDataRangeTransport) {
                  pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
                     messageHandler.send('OnDataRange', {
                        begin: begin,
                        chunk: chunk
                     });
                  });

                  pdfDataRangeTransport.addProgressListener(function(loaded) {
                     messageHandler.send('OnDataProgress', {
                        loaded: loaded
                     });
                  });

                  messageHandler.on('RequestDataRange',
                     function transportDataRange(data) {
                        pdfDataRangeTransport.requestDataRange(data.begin, data.end);
                     }, this);
               }

               messageHandler.on('GetDoc', function transportDoc(data) {
                  var pdfInfo = data.pdfInfo;
                  var pdfDocument = new PDFDocumentProxy(pdfInfo, this);
                  this.pdfDocument = pdfDocument;
                  this.workerReadyPromise.resolve(pdfDocument);
               }, this);

               messageHandler.on('NeedPassword', function transportPassword(data) {
                  if (this.passwordCallback) {
                     return this.passwordCallback(updatePassword,
                        PasswordResponses.NEED_PASSWORD);
                  }
                  this.workerReadyPromise.reject(data.exception.message, data.exception);
               }, this);

               messageHandler.on('IncorrectPassword', function transportBadPass(data) {
                  if (this.passwordCallback) {
                     return this.passwordCallback(updatePassword,
                        PasswordResponses.INCORRECT_PASSWORD);
                  }
                  this.workerReadyPromise.reject(data.exception.message, data.exception);
               }, this);

               messageHandler.on('InvalidPDF', function transportInvalidPDF(data) {
                  this.workerReadyPromise.reject(data.exception.name, data.exception);
               }, this);

               messageHandler.on('MissingPDF', function transportMissingPDF(data) {
                  this.workerReadyPromise.reject(data.exception.message, data.exception);
               }, this);

               messageHandler.on('UnknownError', function transportUnknownError(data) {
                  this.workerReadyPromise.reject(data.exception.message, data.exception);
               }, this);

               messageHandler.on('GetPage', function transportPage(data) {
                  var pageInfo = data.pageInfo;
                  var page = new PDFPageProxy(pageInfo, this);
                  this.pageCache[pageInfo.pageIndex] = page;
                  var promise = this.pagePromises[pageInfo.pageIndex];
                  promise.resolve(page);
               }, this);

               messageHandler.on('GetAnnotations', function transportAnnotations(data) {
                  var annotations = data.annotations;
                  var promise = this.pageCache[data.pageIndex].annotationsPromise;
                  promise.resolve(annotations);
               }, this);

               messageHandler.on('StartRenderPage', function transportRender(data) {
                  var page = this.pageCache[data.pageIndex];

                  page.stats.timeEnd('Page Request');
                  page._startRenderPage(data.transparency);
               }, this);

               messageHandler.on('RenderPageChunk', function transportRender(data) {
                  var page = this.pageCache[data.pageIndex];

                  page._renderPageChunk(data.operatorList);
               }, this);

               messageHandler.on('commonobj', function transportObj(data) {
                  var id = data[0];
                  var type = data[1];
                  if (this.commonObjs.hasData(id))
                     return;

                  switch (type) {
                     case 'Font':
                        var exportedData = data[2];

                        var font;
                        if ('error' in exportedData) {
                           var error = exportedData.error;
                           warn('Error during font loading: ' + error);
                           this.commonObjs.resolve(id, error);
                           break;
                        } else {
                           font = new FontFace(exportedData);
                        }

                        FontLoader.bind(
                           [font],
                           function fontReady(fontObjs) {
                              this.commonObjs.resolve(id, font);
                           }.bind(this)
                        );
                        break;
                     case 'FontPath':
                        this.commonObjs.resolve(id, data[2]);
                        break;
                     default:
                        error('Got unknown common object type ' + type);
                  }
               }, this);

               messageHandler.on('obj', function transportObj(data) {
                  var id = data[0];
                  var pageIndex = data[1];
                  var type = data[2];
                  var pageProxy = this.pageCache[pageIndex];
                  if (pageProxy.objs.hasData(id))
                     return;

                  switch (type) {
                     case 'JpegStream':
                        var imageData = data[3];
                        loadJpegStream(id, imageData, pageProxy.objs);
                        break;
                     case 'Image':
                        var imageData = data[3];
                        pageProxy.objs.resolve(id, imageData);

                        // heuristics that will allow not to store large data
                        var MAX_IMAGE_SIZE_TO_STORE = 8000000;
                        if ('data' in imageData &&
                           imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
                           pageProxy.cleanupAfterRender = true;
                        }
                        break;
                     default:
                        error('Got unknown object type ' + type);
                  }
               }, this);

               messageHandler.on('DocProgress', function transportDocProgress(data) {
                  if (this.progressCallback) {
                     this.progressCallback({
                        loaded: data.loaded,
                        total: data.total
                     });
                  }
               }, this);

               messageHandler.on('DocError', function transportDocError(data) {
                  this.workerReadyPromise.reject(data);
               }, this);

               messageHandler.on('PageError', function transportError(data) {
                  var page = this.pageCache[data.pageNum - 1];
                  if (page.displayReadyPromise)
                     page.displayReadyPromise.reject(data.error);
                  else
                     error(data.error);
               }, this);

               messageHandler.on('JpegDecode', function(data, promise) {
                  var imageData = data[0];
                  var components = data[1];
                  if (components != 3 && components != 1)
                     error('Only 3 component or 1 component can be returned');

                  var img = new Image();
                  img.onload = (function messageHandler_onloadClosure() {
                     var width = img.width;
                     var height = img.height;
                     var size = width * height;
                     var rgbaLength = size * 4;
                     var buf = new Uint8Array(size * components);
                     var tmpCanvas = createScratchCanvas(width, height);
                     var tmpCtx = tmpCanvas.getContext('2d');
                     tmpCtx.drawImage(img, 0, 0);
                     var data = tmpCtx.getImageData(0, 0, width, height).data;

                     if (components == 3) {
                        for (var i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
                           buf[j] = data[i];
                           buf[j + 1] = data[i + 1];
                           buf[j + 2] = data[i + 2];
                        }
                     } else if (components == 1) {
                        for (var i = 0, j = 0; i < rgbaLength; i += 4, j++) {
                           buf[j] = data[i];
                        }
                     }
                     promise.resolve({ data: buf, width: width, height: height});
                  }).bind(this);
                  var src = 'data:image/jpeg;base64,' + window.btoa(imageData);
                  img.src = src;
               });
            },

         fetchDocument: function WorkerTransport_fetchDocument(source) {
            source.disableAutoFetch = PDFJS.disableAutoFetch;
            source.chunkedViewerLoading = !!this.pdfDataRangeTransport;
            this.messageHandler.send('GetDocRequest', {
               source: source,
               disableRange: PDFJS.disableRange,
               maxImageSize: PDFJS.maxImageSize,
               disableFontFace: PDFJS.disableFontFace
            });
         },

         getData: function WorkerTransport_getData(promise) {
            this.messageHandler.send('GetData', null, function(data) {
               promise.resolve(data);
            });
         },

         dataLoaded: function WorkerTransport_dataLoaded() {
            var promise = new PDFJS.Promise();
            this.messageHandler.send('DataLoaded', null, function(args) {
               promise.resolve(args);
            });
            return promise;
         },

         getPage: function WorkerTransport_getPage(pageNumber, promise) {
            var pageIndex = pageNumber - 1;
            if (pageIndex in this.pagePromises)
               return this.pagePromises[pageIndex];
            var promise = new PDFJS.Promise('Page ' + pageNumber);
            this.pagePromises[pageIndex] = promise;
            this.messageHandler.send('GetPageRequest', { pageIndex: pageIndex });
            return promise;
         },

         getAnnotations: function WorkerTransport_getAnnotations(pageIndex) {
            this.messageHandler.send('GetAnnotationsRequest',
               { pageIndex: pageIndex });
         },

         getDestinations: function WorkerTransport_getDestinations() {
            var promise = new PDFJS.Promise();
            this.messageHandler.send('GetDestinations', null,
               function transportDestinations(destinations) {
                  promise.resolve(destinations);
               }
            );
            return promise;
         }
      };
      return WorkerTransport;

   })();

   /**
    * A PDF document and page is built of many objects. E.g. there are objects
    * for fonts, images, rendering code and such. These objects might get processed
    * inside of a worker. The `PDFObjects` implements some basic functions to
    * manage these objects.
    */
   var PDFObjects = (function PDFObjectsClosure() {
      function PDFObjects() {
         this.objs = {};
      }

      PDFObjects.prototype = {
         /**
          * Internal function.
          * Ensures there is an object defined for `objId`.
          */
         ensureObj: function PDFObjects_ensureObj(objId) {
            if (this.objs[objId])
               return this.objs[objId];

            var obj = {
               promise: new Promise(objId),
               data: null,
               resolved: false
            };
            this.objs[objId] = obj;

            return obj;
         },

         /**
          * If called *without* callback, this returns the data of `objId` but the
          * object needs to be resolved. If it isn't, this function throws.
          *
          * If called *with* a callback, the callback is called with the data of the
          * object once the object is resolved. That means, if you call this
          * function and the object is already resolved, the callback gets called
          * right away.
          */
         get: function PDFObjects_get(objId, callback) {
            // If there is a callback, then the get can be async and the object is
            // not required to be resolved right now
            if (callback) {
               this.ensureObj(objId).promise.then(callback);
               return null;
            }

            // If there isn't a callback, the user expects to get the resolved data
            // directly.
            var obj = this.objs[objId];

            // If there isn't an object yet or the object isn't resolved, then the
            // data isn't ready yet!
            if (!obj || !obj.resolved)
               error('Requesting object that isn\'t resolved yet ' + objId);

            return obj.data;
         },

         /**
          * Resolves the object `objId` with optional `data`.
          */
         resolve: function PDFObjects_resolve(objId, data) {
            var obj = this.ensureObj(objId);

            obj.resolved = true;
            obj.data = data;
            obj.promise.resolve(data);
         },

         isResolved: function PDFObjects_isResolved(objId) {
            var objs = this.objs;

            if (!objs[objId]) {
               return false;
            } else {
               return objs[objId].resolved;
            }
         },

         hasData: function PDFObjects_hasData(objId) {
            return this.isResolved(objId);
         },

         /**
          * Returns the data of `objId` if object exists, null otherwise.
          */
         getData: function PDFObjects_getData(objId) {
            var objs = this.objs;
            if (!objs[objId] || !objs[objId].resolved) {
               return null;
            } else {
               return objs[objId].data;
            }
         },

         clear: function PDFObjects_clear() {
            this.objs = {};
         }
      };
      return PDFObjects;
   })();
   /*
    * RenderTask is basically a promise but adds a cancel function to terminate it.
    */
   var RenderTask = (function RenderTaskClosure() {
      function RenderTask(internalRenderTask) {
         this.internalRenderTask = internalRenderTask;
         Promise.call(this);
      }

      RenderTask.prototype = Object.create(Promise.prototype);

      /**
       * Cancel the rendering task. If the task is curently rendering it will not be
       * cancelled until graphics pauses with a timeout. The promise that this
       * object extends will resolved when cancelled.
       */
      RenderTask.prototype.cancel = function RenderTask_cancel() {
         this.internalRenderTask.cancel();
      };

      return RenderTask;
   })();

   var InternalRenderTask = (function InternalRenderTaskClosure() {

      function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
                                  pageNumber) {
         this.callback = callback;
         this.params = params;
         this.objs = objs;
         this.commonObjs = commonObjs;
         this.operatorListIdx = null;
         this.operatorList = operatorList;
         this.pageNumber = pageNumber;
         this.running = false;
         this.graphicsReadyCallback = null;
         this.graphicsReady = false;
         this.cancelled = false;
      }

      InternalRenderTask.prototype = {

         initalizeGraphics:
            function InternalRenderTask_initalizeGraphics(transparency) {

               if (this.cancelled) {
                  return;
               }
               if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
                  globalScope.StepperManager.enabled) {
                  this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
                  this.stepper.init(this.operatorList);
                  this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
               }

               var params = this.params;
               this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
                  this.objs, params.textLayer,
                  params.imageLayer);

               this.gfx.beginDrawing(params.viewport, transparency);
               this.operatorListIdx = 0;
               this.graphicsReady = true;
               if (this.graphicsReadyCallback) {
                  this.graphicsReadyCallback();
               }
            },

         cancel: function InternalRenderTask_cancel() {
            this.running = false;
            this.cancelled = true;
            this.callback('cancelled');
         },

         operatorListChanged: function InternalRenderTask_operatorListChanged() {
            if (!this.graphicsReady) {
               if (!this.graphicsReadyCallback) {
                  this.graphicsReadyCallback = this._continue.bind(this);
               }
               return;
            }

            if (this.stepper) {
               this.stepper.updateOperatorList(this.operatorList);
            }

            if (this.running) {
               return;
            }
            this._continue();
         },

         _continue: function InternalRenderTask__continue() {
            this.running = true;
            if (this.cancelled) {
               return;
            }
            if (this.params.continueCallback) {
               this.params.continueCallback(this._next.bind(this));
            } else {
               this._next();
            }
         },

         _next: function InternalRenderTask__next() {
            if (this.cancelled) {
               return;
            }
            this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
               this.operatorListIdx,
               this._continue.bind(this),
               this.stepper);
            if (this.operatorListIdx === this.operatorList.fnArray.length) {
               this.running = false;
               if (this.operatorList.lastChunk) {
                  this.gfx.endDrawing();
                  this.callback();
               }
            }
         }

      };

      return InternalRenderTask;
   })();


   var Metadata = PDFJS.Metadata = (function MetadataClosure() {
      function fixMetadata(meta) {
         return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) {
            var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g,
               function(code, d1, d2, d3) {
                  return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);
               });
            var chars = '';
            for (var i = 0; i < bytes.length; i += 2) {
               var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);
               chars += code >= 32 && code < 127 && code != 60 && code != 62 &&
                  code != 38 && false ? String.fromCharCode(code) :
                  '&#x' + (0x10000 + code).toString(16).substring(1) + ';';
            }
            return '>' + chars;
         });
      }

      function Metadata(meta) {
         if (typeof meta === 'string') {
            // Ghostscript produces invalid metadata
            meta = fixMetadata(meta);

            var parser = new DOMParser();
            meta = parser.parseFromString(meta, 'application/xml');
         } else if (!(meta instanceof Document)) {
            error('Metadata: Invalid metadata object');
         }

         this.metaDocument = meta;
         this.metadata = {};
         this.parse();
      }

      Metadata.prototype = {
         parse: function Metadata_parse() {
            var doc = this.metaDocument;
            var rdf = doc.documentElement;

            if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
               rdf = rdf.firstChild;
               while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf')
                  rdf = rdf.nextSibling;
            }

            var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
            if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes())
               return;

            var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;

            for (i = 0, length = children.length; i < length; i++) {
               desc = children[i];
               if (desc.nodeName.toLowerCase() !== 'rdf:description')
                  continue;

               for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
                  if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
                     entry = desc.childNodes[ii];
                     name = entry.nodeName.toLowerCase();
                     this.metadata[name] = entry.textContent.trim();
                  }
               }
            }
         },

         get: function Metadata_get(name) {
            return this.metadata[name] || null;
         },

         has: function Metadata_has(name) {
            return typeof this.metadata[name] !== 'undefined';
         }
      };

      return Metadata;
   })();


// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.

// Minimal font size that would be used during canvas fillText operations.
   var MIN_FONT_SIZE = 16;

   var COMPILE_TYPE3_GLYPHS = true;

   function createScratchCanvas(width, height) {
      var canvas = document.createElement('canvas');
      canvas.width = width;
      canvas.height = height;
      return canvas;
   }

   function addContextCurrentTransform(ctx) {
      // If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
      if (!ctx.mozCurrentTransform) {
         // Store the original context
         ctx._scaleX = ctx._scaleX || 1.0;
         ctx._scaleY = ctx._scaleY || 1.0;
         ctx._originalSave = ctx.save;
         ctx._originalRestore = ctx.restore;
         ctx._originalRotate = ctx.rotate;
         ctx._originalScale = ctx.scale;
         ctx._originalTranslate = ctx.translate;
         ctx._originalTransform = ctx.transform;
         ctx._originalSetTransform = ctx.setTransform;

         ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0];
         ctx._transformStack = [];

         Object.defineProperty(ctx, 'mozCurrentTransform', {
            get: function getCurrentTransform() {
               return this._transformMatrix;
            }
         });

         Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
            get: function getCurrentTransformInverse() {
               // Calculation done using WolframAlpha:
               // http://www.wolframalpha.com/input/?
               //   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}

               var m = this._transformMatrix;
               var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];

               var ad_bc = a * d - b * c;
               var bc_ad = b * c - a * d;

               return [
                  d / ad_bc,
                  b / bc_ad,
                  c / bc_ad,
                  a / ad_bc,
                  (d * e - c * f) / bc_ad,
                  (b * e - a * f) / ad_bc
               ];
            }
         });

         ctx.save = function ctxSave() {
            var old = this._transformMatrix;
            this._transformStack.push(old);
            this._transformMatrix = old.slice(0, 6);

            this._originalSave();
         };

         ctx.restore = function ctxRestore() {
            var prev = this._transformStack.pop();
            if (prev) {
               this._transformMatrix = prev;
               this._originalRestore();
            }
         };

         ctx.translate = function ctxTranslate(x, y) {
            var m = this._transformMatrix;
            m[4] = m[0] * x + m[2] * y + m[4];
            m[5] = m[1] * x + m[3] * y + m[5];

            this._originalTranslate(x, y);
         };

         ctx.scale = function ctxScale(x, y) {
            var m = this._transformMatrix;
            m[0] = m[0] * x;
            m[1] = m[1] * x;
            m[2] = m[2] * y;
            m[3] = m[3] * y;

            this._originalScale(x, y);
         };

         ctx.transform = function ctxTransform(a, b, c, d, e, f) {
            var m = this._transformMatrix;
            this._transformMatrix = [
               m[0] * a + m[2] * b,
               m[1] * a + m[3] * b,
               m[0] * c + m[2] * d,
               m[1] * c + m[3] * d,
               m[0] * e + m[2] * f + m[4],
               m[1] * e + m[3] * f + m[5]
            ];

            ctx._originalTransform(a, b, c, d, e, f);
         };

         ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
            this._transformMatrix = [a, b, c, d, e, f];

            ctx._originalSetTransform(a, b, c, d, e, f);
         };

         ctx.rotate = function ctxRotate(angle) {
            var cosValue = Math.cos(angle);
            var sinValue = Math.sin(angle);

            var m = this._transformMatrix;
            this._transformMatrix = [
               m[0] * cosValue + m[2] * sinValue,
               m[1] * cosValue + m[3] * sinValue,
               m[0] * (-sinValue) + m[2] * cosValue,
               m[1] * (-sinValue) + m[3] * cosValue,
               m[4],
               m[5]
            ];

            this._originalRotate(angle);
         };
      }
   }

   var CachedCanvases = (function CachedCanvasesClosure() {
      var cache = {};
      return {
         getCanvas: function CachedCanvases_getCanvas(id, width, height,
                                                      trackTransform) {
            var canvasEntry;
            if (id in cache) {
               canvasEntry = cache[id];
               canvasEntry.canvas.width = width;
               canvasEntry.canvas.height = height;
               // reset canvas transform for emulated mozCurrentTransform, if needed
               canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);
            } else {
               var canvas = createScratchCanvas(width, height);
               var ctx = canvas.getContext('2d');
               if (trackTransform) {
                  addContextCurrentTransform(ctx);
               }
               cache[id] = canvasEntry = {canvas: canvas, context: ctx};
            }
            return canvasEntry;
         },
         clear: function () {
            cache = {};
         }
      };
   })();

   function compileType3Glyph(imgData) {
      var POINT_TO_PROCESS_LIMIT = 1000;

      var width = imgData.width, height = imgData.height;
      var i, j, j0, width1 = width + 1;
      var points = new Uint8Array(width1 * (height + 1));
      var POINT_TYPES =
         new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);
      // finding iteresting points: every point is located between mask pixels,
      // so there will be points of the (width + 1)x(height + 1) grid. Every point
      // will have flags assigned based on neighboring mask pixels:
      //   4 | 8
      //   --P--
      //   2 | 1
      // We are interested only in points with the flags:
      //   - outside corners: 1, 2, 4, 8;
      //   - inside corners: 7, 11, 13, 14;
      //   - and, intersections: 5, 10.
      var pos = 3, data = imgData.data, lineSize = width * 4, count = 0;
      if (data[3] !== 0) {
         points[0] = 1;
         ++count;
      }
      for (j = 1; j < width; j++) {
         if (data[pos] !== data[pos + 4]) {
            points[j] = data[pos] ? 2 : 1;
            ++count;
         }
         pos += 4;
      }
      if (data[pos] !== 0) {
         points[j] = 2;
         ++count;
      }
      pos += 4;
      for (i = 1; i < height; i++) {
         j0 = i * width1;
         if (data[pos - lineSize] !== data[pos]) {
            points[j0] = data[pos] ? 1 : 8;
            ++count;
         }
         // 'sum' is the position of the current pixel configuration in the 'TYPES'
         // array (in order 8-1-2-4, so we can use '>>2' to shift the column).
         var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
         for (j = 1; j < width; j++) {
            sum = (sum >> 2) + (data[pos + 4] ? 4 : 0) +
               (data[pos - lineSize + 4] ? 8 : 0);
            if (POINT_TYPES[sum]) {
               points[j0 + j] = POINT_TYPES[sum];
               ++count;
            }
            pos += 4;
         }
         if (data[pos - lineSize] !== data[pos]) {
            points[j0 + j] = data[pos] ? 2 : 4;
            ++count;
         }
         pos += 4;

         if (count > POINT_TO_PROCESS_LIMIT) {
            return null;
         }
      }

      pos -= lineSize;
      j0 = i * width1;
      if (data[pos] !== 0) {
         points[j0] = 8;
         ++count;
      }
      for (j = 1; j < width; j++) {
         if (data[pos] !== data[pos + 4]) {
            points[j0 + j] = data[pos] ? 4 : 8;
            ++count;
         }
         pos += 4;
      }
      if (data[pos] !== 0) {
         points[j0 + j] = 4;
         ++count;
      }
      if (count > POINT_TO_PROCESS_LIMIT) {
         return null;
      }

      // building outlines
      var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
      var outlines = [];
      for (i = 0; count && i <= height; i++) {
         var p = i * width1;
         var end = p + width;
         while (p < end && !points[p]) {
            p++;
         }
         if (p === end) {
            continue;
         }
         var coords = [p % width1, i];

         var type = points[p], p0 = p, pp;
         do {
            var step = steps[type];
            do { p += step; } while (!points[p]);

            pp = points[p];
            if (pp !== 5 && pp !== 10) {
               // set new direction
               type = pp;
               // delete mark
               points[p] = 0;
            } else { // type is 5 or 10, ie, a crossing
               // set new direction
               type = pp & ((0x33 * type) >> 4);
               // set new type for "future hit"
               points[p] &= (type >> 2 | type << 2);
            }

            coords.push(p % width1);
            coords.push((p / width1) | 0);
            --count;
         } while (p0 !== p);
         outlines.push(coords);
         --i;
      }

      var drawOutline = function(c) {
         c.save();
         // the path shall be painted in [0..1]x[0..1] space
         c.scale(1 / width, -1 / height);
         c.translate(0, -height);
         c.beginPath();
         for (var i = 0, ii = outlines.length; i < ii; i++) {
            var o = outlines[i];
            c.moveTo(o[0], o[1]);
            for (var j = 2, jj = o.length; j < jj; j += 2) {
               c.lineTo(o[j], o[j+1]);
            }
         }
         c.fill();
         c.beginPath();
         c.restore();
      };

      return drawOutline;
   }

   var CanvasExtraState = (function CanvasExtraStateClosure() {
      function CanvasExtraState(old) {
         // Are soft masks and alpha values shapes or opacities?
         this.alphaIsShape = false;
         this.fontSize = 0;
         this.fontSizeScale = 1;
         this.textMatrix = IDENTITY_MATRIX;
         this.fontMatrix = FONT_IDENTITY_MATRIX;
         this.leading = 0;
         // Current point (in user coordinates)
         this.x = 0;
         this.y = 0;
         // Start of text line (in text coordinates)
         this.lineX = 0;
         this.lineY = 0;
         // Character and word spacing
         this.charSpacing = 0;
         this.wordSpacing = 0;
         this.textHScale = 1;
         this.textRenderingMode = TextRenderingMode.FILL;
         this.textRise = 0;
         // Color spaces
         this.fillColorSpace = ColorSpace.singletons.gray;
         this.fillColorSpaceObj = null;
         this.strokeColorSpace = ColorSpace.singletons.gray;
         this.strokeColorSpaceObj = null;
         this.fillColorObj = null;
         this.strokeColorObj = null;
         // Default fore and background colors
         this.fillColor = '#000000';
         this.strokeColor = '#000000';
         // Note: fill alpha applies to all non-stroking operations
         this.fillAlpha = 1;
         this.strokeAlpha = 1;
         this.lineWidth = 1;
         this.paintFormXObjectDepth = 0;

         this.old = old;
      }

      CanvasExtraState.prototype = {
         clone: function CanvasExtraState_clone() {
            return Object.create(this);
         },
         setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
            this.x = x;
            this.y = y;
         }
      };
      return CanvasExtraState;
   })();

   var CanvasGraphics = (function CanvasGraphicsClosure() {
      // Defines the time the executeOperatorList is going to be executing
      // before it stops and shedules a continue of execution.
      var EXECUTION_TIME = 15;

      function CanvasGraphics(canvasCtx, commonObjs, objs, textLayer, imageLayer) {
         this.ctx = canvasCtx;
         this.current = new CanvasExtraState();
         this.stateStack = [];
         this.pendingClip = null;
         this.pendingEOFill = false;
         this.res = null;
         this.xobjs = null;
         this.commonObjs = commonObjs;
         this.objs = objs;
         this.textLayer = textLayer;
         this.imageLayer = imageLayer;
         this.groupStack = [];
         this.processingType3 = null;
         // Patterns are painted relative to the initial page/form transform, see pdf
         // spec 8.7.2 NOTE 1.
         this.baseTransform = null;
         this.baseTransformStack = [];
         this.groupLevel = 0;
         if (canvasCtx) {
            addContextCurrentTransform(canvasCtx);
         }
      }

      function putBinaryImageData(ctx, imgData) {
         if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
            ctx.putImageData(imgData, 0, 0);
            return;
         }

         var tmpImgData = ctx.createImageData(imgData.width, imgData.height);

         var data = imgData.data;
         var tmpImgDataPixels = tmpImgData.data;
         if ('set' in tmpImgDataPixels)
            tmpImgDataPixels.set(data);
         else {
            // Copy over the imageData pixel by pixel.
            for (var i = 0, ii = tmpImgDataPixels.length; i < ii; i++)
               tmpImgDataPixels[i] = data[i];
         }

         ctx.putImageData(tmpImgData, 0, 0);
      }

      function copyCtxState(sourceCtx, destCtx) {
         var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha',
            'lineWidth', 'lineCap', 'lineJoin', 'miterLimit',
            'globalCompositeOperation', 'font'];
         for (var i = 0, ii = properties.length; i < ii; i++) {
            var property = properties[i];
            if (property in sourceCtx) {
               destCtx[property] = sourceCtx[property];
            }
         }
         if ('setLineDash' in sourceCtx) {
            destCtx.setLineDash(sourceCtx.getLineDash());
            destCtx.lineDashOffset =  sourceCtx.lineDashOffset;
         } else if ('mozDash' in sourceCtx) {
            destCtx.mozDash = sourceCtx.mozDash;
            destCtx.mozDashOffset = sourceCtx.mozDashOffset;
         }
      }

      var LINE_CAP_STYLES = ['butt', 'round', 'square'];
      var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
      var NORMAL_CLIP = {};
      var EO_CLIP = {};

      CanvasGraphics.prototype = {
         slowCommands: {
            'stroke': true,
            'closeStroke': true,
            'fill': true,
            'eoFill': true,
            'fillStroke': true,
            'eoFillStroke': true,
            'closeFillStroke': true,
            'closeEOFillStroke': true,
            'showText': true,
            'showSpacedText': true,
            'setStrokeColorSpace': true,
            'setFillColorSpace': true,
            'setStrokeColor': true,
            'setStrokeColorN': true,
            'setFillColor': true,
            'setFillColorN': true,
            'setStrokeGray': true,
            'setFillGray': true,
            'setStrokeRGBColor': true,
            'setFillRGBColor': true,
            'setStrokeCMYKColor': true,
            'setFillCMYKColor': true,
            'paintJpegXObject': true,
            'paintImageXObject': true,
            'paintInlineImageXObject': true,
            'paintInlineImageXObjectGroup': true,
            'paintImageMaskXObject': true,
            'paintImageMaskXObjectGroup': true,
            'shadingFill': true
         },

         beginDrawing: function CanvasGraphics_beginDrawing(viewport, transparency) {
            // For pdfs that use blend modes we have to clear the canvas else certain
            // blend modes can look wrong since we'd be blending with a white
            // backdrop. The problem with a transparent backdrop though is we then
            // don't get sub pixel anti aliasing on text, so we fill with white if
            // we can.
            var width = this.ctx.canvas.width;
            var height = this.ctx.canvas.height;
            if (transparency) {
               this.ctx.clearRect(0, 0, width, height);
            } else {
               this.ctx.mozOpaque = true;
               this.ctx.save();
               this.ctx.fillStyle = 'rgb(255, 255, 255)';
               this.ctx.fillRect(0, 0, width, height);
               this.ctx.restore();
            }

            var transform = viewport.transform;
            this.baseTransform = transform.slice();
            this.ctx.save();
            this.ctx.transform.apply(this.ctx, transform);

            if (this.textLayer) {
               this.textLayer.beginLayout();
            }
            if (this.imageLayer) {
               this.imageLayer.beginLayout();
            }
         },

         executeOperatorList: function CanvasGraphics_executeOperatorList(
            operatorList,
            executionStartIdx, continueCallback,
            stepper) {
            var argsArray = operatorList.argsArray;
            var fnArray = operatorList.fnArray;
            var i = executionStartIdx || 0;
            var argsArrayLen = argsArray.length;

            // Sometimes the OperatorList to execute is empty.
            if (argsArrayLen == i) {
               return i;
            }

            var executionEndIdx;
            var endTime = Date.now() + EXECUTION_TIME;

            var commonObjs = this.commonObjs;
            var objs = this.objs;
            var fnName;
            var slowCommands = this.slowCommands;

            while (true) {
               if (stepper && i === stepper.nextBreakPoint) {
                  stepper.breakIt(i, continueCallback);
                  return i;
               }

               fnName = fnArray[i];

               if (fnName !== 'dependency') {
                  this[fnName].apply(this, argsArray[i]);
               } else {
                  var deps = argsArray[i];
                  for (var n = 0, nn = deps.length; n < nn; n++) {
                     var depObjId = deps[n];
                     var common = depObjId.substring(0, 2) == 'g_';

                     // If the promise isn't resolved yet, add the continueCallback
                     // to the promise and bail out.
                     if (!common && !objs.isResolved(depObjId)) {
                        objs.get(depObjId, continueCallback);
                        return i;
                     }
                     if (common && !commonObjs.isResolved(depObjId)) {
                        commonObjs.get(depObjId, continueCallback);
                        return i;
                     }
                  }
               }

               i++;

               // If the entire operatorList was executed, stop as were done.
               if (i == argsArrayLen) {
                  return i;
               }

               // If the execution took longer then a certain amount of time, shedule
               // to continue exeution after a short delay.
               // However, this is only possible if a 'continueCallback' is passed in.
               if (continueCallback && slowCommands[fnName] && Date.now() > endTime) {
                  setTimeout(continueCallback, 0);
                  return i;
               }

               // If the operatorList isn't executed completely yet OR the execution
               // time was short enough, do another execution round.
            }
         },

         endDrawing: function CanvasGraphics_endDrawing() {
            this.ctx.restore();
            CachedCanvases.clear();

            if (this.textLayer) {
               this.textLayer.endLayout();
            }
            if (this.imageLayer) {
               this.imageLayer.endLayout();
            }
         },

         // Graphics state
         setLineWidth: function CanvasGraphics_setLineWidth(width) {
            this.current.lineWidth = width;
            this.ctx.lineWidth = width;
         },
         setLineCap: function CanvasGraphics_setLineCap(style) {
            this.ctx.lineCap = LINE_CAP_STYLES[style];
         },
         setLineJoin: function CanvasGraphics_setLineJoin(style) {
            this.ctx.lineJoin = LINE_JOIN_STYLES[style];
         },
         setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
            this.ctx.miterLimit = limit;
         },
         setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
            var ctx = this.ctx;
            if ('setLineDash' in ctx) {
               ctx.setLineDash(dashArray);
               ctx.lineDashOffset = dashPhase;
            } else {
               ctx.mozDash = dashArray;
               ctx.mozDashOffset = dashPhase;
            }
         },
         setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
            // Maybe if we one day fully support color spaces this will be important
            // for now we can ignore.
            // TODO set rendering intent?
         },
         setFlatness: function CanvasGraphics_setFlatness(flatness) {
            // There's no way to control this with canvas, but we can safely ignore.
            // TODO set flatness?
         },
         setGState: function CanvasGraphics_setGState(states) {
            for (var i = 0, ii = states.length; i < ii; i++) {
               var state = states[i];
               var key = state[0];
               var value = state[1];

               switch (key) {
                  case 'LW':
                     this.setLineWidth(value);
                     break;
                  case 'LC':
                     this.setLineCap(value);
                     break;
                  case 'LJ':
                     this.setLineJoin(value);
                     break;
                  case 'ML':
                     this.setMiterLimit(value);
                     break;
                  case 'D':
                     this.setDash(value[0], value[1]);
                     break;
                  case 'RI':
                     this.setRenderingIntent(value);
                     break;
                  case 'FL':
                     this.setFlatness(value);
                     break;
                  case 'Font':
                     this.setFont(value[0], value[1]);
                     break;
                  case 'CA':
                     this.current.strokeAlpha = state[1];
                     break;
                  case 'ca':
                     this.current.fillAlpha = state[1];
                     this.ctx.globalAlpha = state[1];
                     break;
                  case 'BM':
                     if (value && value.name && (value.name !== 'Normal')) {
                        var mode = value.name.replace(/([A-Z])/g,
                           function(c) {
                              return '-' + c.toLowerCase();
                           }
                        ).substring(1);
                        this.ctx.globalCompositeOperation = mode;
                        if (this.ctx.globalCompositeOperation !== mode) {
                           warn('globalCompositeOperation "' + mode +
                              '" is not supported');
                        }
                     } else {
                        this.ctx.globalCompositeOperation = 'source-over';
                     }
                     break;
               }
            }
         },
         save: function CanvasGraphics_save() {
            this.ctx.save();
            var old = this.current;
            this.stateStack.push(old);
            this.current = old.clone();
         },
         restore: function CanvasGraphics_restore() {
            var prev = this.stateStack.pop();
            if (prev) {
               this.current = prev;
               this.ctx.restore();
            }
         },
         transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
            this.ctx.transform(a, b, c, d, e, f);
         },

         // Path
         moveTo: function CanvasGraphics_moveTo(x, y) {
            this.ctx.moveTo(x, y);
            this.current.setCurrentPoint(x, y);
         },
         lineTo: function CanvasGraphics_lineTo(x, y) {
            this.ctx.lineTo(x, y);
            this.current.setCurrentPoint(x, y);
         },
         curveTo: function CanvasGraphics_curveTo(x1, y1, x2, y2, x3, y3) {
            this.ctx.bezierCurveTo(x1, y1, x2, y2, x3, y3);
            this.current.setCurrentPoint(x3, y3);
         },
         curveTo2: function CanvasGraphics_curveTo2(x2, y2, x3, y3) {
            var current = this.current;
            this.ctx.bezierCurveTo(current.x, current.y, x2, y2, x3, y3);
            current.setCurrentPoint(x3, y3);
         },
         curveTo3: function CanvasGraphics_curveTo3(x1, y1, x3, y3) {
            this.curveTo(x1, y1, x3, y3, x3, y3);
            this.current.setCurrentPoint(x3, y3);
         },
         closePath: function CanvasGraphics_closePath() {
            this.ctx.closePath();
         },
         rectangle: function CanvasGraphics_rectangle(x, y, width, height) {
            this.ctx.rect(x, y, width, height);
         },
         stroke: function CanvasGraphics_stroke(consumePath) {
            consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
            var ctx = this.ctx;
            var strokeColor = this.current.strokeColor;
            if (this.current.lineWidth === 0)
               ctx.lineWidth = this.getSinglePixelWidth();
            // For stroke we want to temporarily change the global alpha to the
            // stroking alpha.
            ctx.globalAlpha = this.current.strokeAlpha;
            if (strokeColor && strokeColor.hasOwnProperty('type') &&
               strokeColor.type === 'Pattern') {
               // for patterns, we transform to pattern space, calculate
               // the pattern, call stroke, and restore to user space
               ctx.save();
               ctx.strokeStyle = strokeColor.getPattern(ctx, this);
               ctx.stroke();
               ctx.restore();
            } else {
               ctx.stroke();
            }
            if (consumePath)
               this.consumePath();
            // Restore the global alpha to the fill alpha
            ctx.globalAlpha = this.current.fillAlpha;
         },
         closeStroke: function CanvasGraphics_closeStroke() {
            this.closePath();
            this.stroke();
         },
         fill: function CanvasGraphics_fill(consumePath) {
            consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
            var ctx = this.ctx;
            var fillColor = this.current.fillColor;
            var needRestore = false;

            if (fillColor && fillColor.hasOwnProperty('type') &&
               fillColor.type === 'Pattern') {
               ctx.save();
               ctx.fillStyle = fillColor.getPattern(ctx, this);
               needRestore = true;
            }

            if (this.pendingEOFill) {
               if ('mozFillRule' in this.ctx) {
                  this.ctx.mozFillRule = 'evenodd';
                  this.ctx.fill();
                  this.ctx.mozFillRule = 'nonzero';
               } else {
                  try {
                     this.ctx.fill('evenodd');
                  } catch (ex) {
                     // shouldn't really happen, but browsers might think differently
                     this.ctx.fill();
                  }
               }
               this.pendingEOFill = false;
            } else {
               this.ctx.fill();
            }

            if (needRestore) {
               ctx.restore();
            }
            if (consumePath) {
               this.consumePath();
            }
         },
         eoFill: function CanvasGraphics_eoFill() {
            this.pendingEOFill = true;
            this.fill();
         },
         fillStroke: function CanvasGraphics_fillStroke() {
            this.fill(false);
            this.stroke(false);

            this.consumePath();
         },
         eoFillStroke: function CanvasGraphics_eoFillStroke() {
            this.pendingEOFill = true;
            this.fillStroke();
         },
         closeFillStroke: function CanvasGraphics_closeFillStroke() {
            this.closePath();
            this.fillStroke();
         },
         closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
            this.pendingEOFill = true;
            this.closePath();
            this.fillStroke();
         },
         endPath: function CanvasGraphics_endPath() {
            this.consumePath();
         },

         // Clipping
         clip: function CanvasGraphics_clip() {
            this.pendingClip = NORMAL_CLIP;
         },
         eoClip: function CanvasGraphics_eoClip() {
            this.pendingClip = EO_CLIP;
         },

         // Text
         beginText: function CanvasGraphics_beginText() {
            this.current.textMatrix = IDENTITY_MATRIX;
            this.current.x = this.current.lineX = 0;
            this.current.y = this.current.lineY = 0;
         },
         endText: function CanvasGraphics_endText() {
            if (!('pendingTextPaths' in this)) {
               this.ctx.beginPath();
               return;
            }
            var paths = this.pendingTextPaths;
            var ctx = this.ctx;

            ctx.save();
            ctx.beginPath();
            for (var i = 0; i < paths.length; i++) {
               var path = paths[i];
               ctx.setTransform.apply(ctx, path.transform);
               ctx.translate(path.x, path.y);
               path.addToPath(ctx, path.fontSize);
            }
            ctx.restore();
            ctx.clip();
            ctx.beginPath();
            delete this.pendingTextPaths;
         },
         setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
            this.current.charSpacing = spacing;
         },
         setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
            this.current.wordSpacing = spacing;
         },
         setHScale: function CanvasGraphics_setHScale(scale) {
            this.current.textHScale = scale / 100;
         },
         setLeading: function CanvasGraphics_setLeading(leading) {
            this.current.leading = -leading;
         },
         setFont: function CanvasGraphics_setFont(fontRefName, size) {
            var fontObj = this.commonObjs.get(fontRefName);
            var current = this.current;

            if (!fontObj)
               error('Can\'t find font for ' + fontRefName);

            current.fontMatrix = fontObj.fontMatrix ? fontObj.fontMatrix :
               FONT_IDENTITY_MATRIX;

            // A valid matrix needs all main diagonal elements to be non-zero
            // This also ensures we bypass FF bugzilla bug #719844.
            if (current.fontMatrix[0] === 0 ||
               current.fontMatrix[3] === 0) {
               warn('Invalid font matrix for font ' + fontRefName);
            }

            // The spec for Tf (setFont) says that 'size' specifies the font 'scale',
            // and in some docs this can be negative (inverted x-y axes).
            if (size < 0) {
               size = -size;
               current.fontDirection = -1;
            } else {
               current.fontDirection = 1;
            }

            this.current.font = fontObj;
            this.current.fontSize = size;

            if (fontObj.coded)
               return; // we don't need ctx.font for Type3 fonts

            var name = fontObj.loadedName || 'sans-serif';
            var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
               (fontObj.bold ? 'bold' : 'normal');

            var italic = fontObj.italic ? 'italic' : 'normal';
            var typeface = '"' + name + '", ' + fontObj.fallbackName;

            // Some font backends cannot handle fonts below certain size.
            // Keeping the font at minimal size and using the fontSizeScale to change
            // the current transformation matrix before the fillText/strokeText.
            // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
            var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE;
            this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 :
               size / MIN_FONT_SIZE;

            var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
            this.ctx.font = rule;
         },
         setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
            this.current.textRenderingMode = mode;
         },
         setTextRise: function CanvasGraphics_setTextRise(rise) {
            this.current.textRise = rise;
         },
         moveText: function CanvasGraphics_moveText(x, y) {
            this.current.x = this.current.lineX += x;
            this.current.y = this.current.lineY += y;
         },
         setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
            this.setLeading(-y);
            this.moveText(x, y);
         },
         setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
            this.current.textMatrix = [a, b, c, d, e, f];

            this.current.x = this.current.lineX = 0;
            this.current.y = this.current.lineY = 0;
         },
         nextLine: function CanvasGraphics_nextLine() {
            this.moveText(0, this.current.leading);
         },
         applyTextTransforms: function CanvasGraphics_applyTextTransforms() {
            var ctx = this.ctx;
            var current = this.current;
            ctx.transform.apply(ctx, current.textMatrix);
            ctx.translate(current.x, current.y + current.textRise);
            if (current.fontDirection > 0) {
               ctx.scale(current.textHScale, -1);
            } else {
               ctx.scale(-current.textHScale, 1);
            }
         },
         createTextGeometry: function CanvasGraphics_createTextGeometry() {
            var geometry = {};
            var ctx = this.ctx;
            var font = this.current.font;
            var ctxMatrix = ctx.mozCurrentTransform;
            var a = ctxMatrix[0], b = ctxMatrix[1], c = ctxMatrix[2];
            var d = ctxMatrix[3], e = ctxMatrix[4], f = ctxMatrix[5];
            var sx = (a >= 0) ?
               Math.sqrt((a * a) + (b * b)) : -Math.sqrt((a * a) + (b * b));
            var sy = (d >= 0) ?
               Math.sqrt((c * c) + (d * d)) : -Math.sqrt((c * c) + (d * d));
            var angle = Math.atan2(b, a);
            var x = e;
            var y = f;
            geometry.x = x;
            geometry.y = y;
            geometry.hScale = sx;
            geometry.vScale = sy;
            geometry.angle = angle;
            geometry.spaceWidth = font.spaceWidth;
            geometry.fontName = font.loadedName;
            geometry.fontFamily = font.fallbackName;
            geometry.fontSize = this.current.fontSize;
            return geometry;
         },

         paintChar: function (character, x, y) {
            var ctx = this.ctx;
            var current = this.current;
            var font = current.font;
            var fontSize = current.fontSize / current.fontSizeScale;
            var textRenderingMode = current.textRenderingMode;
            var fillStrokeMode = textRenderingMode &
               TextRenderingMode.FILL_STROKE_MASK;
            var isAddToPathSet = !!(textRenderingMode &
               TextRenderingMode.ADD_TO_PATH_FLAG);

            var addToPath;
            if (font.disableFontFace || isAddToPathSet) {
               addToPath = font.getPathGenerator(this.commonObjs, character);
            }

            if (font.disableFontFace) {
               ctx.save();
               ctx.translate(x, y);
               ctx.beginPath();
               addToPath(ctx, fontSize);
               if (fillStrokeMode === TextRenderingMode.FILL ||
                  fillStrokeMode === TextRenderingMode.FILL_STROKE) {
                  ctx.fill();
               }
               if (fillStrokeMode === TextRenderingMode.STROKE ||
                  fillStrokeMode === TextRenderingMode.FILL_STROKE) {
                  ctx.stroke();
               }
               ctx.restore();
            } else {
               if (fillStrokeMode === TextRenderingMode.FILL ||
                  fillStrokeMode === TextRenderingMode.FILL_STROKE) {
                  ctx.fillText(character, x, y);
               }
               if (fillStrokeMode === TextRenderingMode.STROKE ||
                  fillStrokeMode === TextRenderingMode.FILL_STROKE) {
                  ctx.strokeText(character, x, y);
               }
            }

            if (isAddToPathSet) {
               var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
               paths.push({
                  transform: ctx.mozCurrentTransform,
                  x: x,
                  y: y,
                  fontSize: fontSize,
                  addToPath: addToPath
               });
            }
         },

         showText: function CanvasGraphics_showText(glyphs, skipTextSelection) {
            var ctx = this.ctx;
            var current = this.current;
            var font = current.font;
            var fontSize = current.fontSize;
            var fontSizeScale = current.fontSizeScale;
            var charSpacing = current.charSpacing;
            var wordSpacing = current.wordSpacing;
            var textHScale = current.textHScale * current.fontDirection;
            var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
            var glyphsLength = glyphs.length;
            var textLayer = this.textLayer;
            var geom;
            var textSelection = textLayer && !skipTextSelection ? true : false;
            var canvasWidth = 0.0;
            var vertical = font.vertical;
            var defaultVMetrics = font.defaultVMetrics;

            // Type3 fonts - each glyph is a "mini-PDF"
            if (font.coded) {
               ctx.save();
               ctx.transform.apply(ctx, current.textMatrix);
               ctx.translate(current.x, current.y);

               ctx.scale(textHScale, 1);

               if (textSelection) {
                  this.save();
                  ctx.scale(1, -1);
                  geom = this.createTextGeometry();
                  this.restore();
               }
               for (var i = 0; i < glyphsLength; ++i) {

                  var glyph = glyphs[i];
                  if (glyph === null) {
                     // word break
                     this.ctx.translate(wordSpacing, 0);
                     current.x += wordSpacing * textHScale;
                     continue;
                  }

                  this.processingType3 = glyph;
                  this.save();
                  ctx.scale(fontSize, fontSize);
                  ctx.transform.apply(ctx, fontMatrix);
                  this.executeOperatorList(glyph.operatorList);
                  this.restore();

                  var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
                  var width = (transformed[0] * fontSize + charSpacing) *
                     current.fontDirection;

                  ctx.translate(width, 0);
                  current.x += width * textHScale;

                  canvasWidth += width;
               }
               ctx.restore();
               this.processingType3 = null;
            } else {
               ctx.save();
               this.applyTextTransforms();

               var lineWidth = current.lineWidth;
               var a1 = current.textMatrix[0], b1 = current.textMatrix[1];
               var scale = Math.sqrt(a1 * a1 + b1 * b1);
               if (scale === 0 || lineWidth === 0)
                  lineWidth = this.getSinglePixelWidth();
               else
                  lineWidth /= scale;

               if (textSelection)
                  geom = this.createTextGeometry();

               if (fontSizeScale != 1.0) {
                  ctx.scale(fontSizeScale, fontSizeScale);
                  lineWidth /= fontSizeScale;
               }

               ctx.lineWidth = lineWidth;

               var x = 0;
               for (var i = 0; i < glyphsLength; ++i) {
                  var glyph = glyphs[i];
                  if (glyph === null) {
                     // word break
                     x += current.fontDirection * wordSpacing;
                     continue;
                  }

                  var restoreNeeded = false;
                  var character = glyph.fontChar;
                  var vmetric = glyph.vmetric || defaultVMetrics;
                  if (vertical) {
                     var vx = glyph.vmetric ? vmetric[1] : glyph.width * 0.5;
                     vx = -vx * fontSize * current.fontMatrix[0];
                     var vy = vmetric[2] * fontSize * current.fontMatrix[0];
                  }
                  var width = vmetric ? -vmetric[0] : glyph.width;
                  var charWidth = width * fontSize * current.fontMatrix[0] +
                     charSpacing * current.fontDirection;
                  var accent = glyph.accent;

                  var scaledX, scaledY, scaledAccentX, scaledAccentY;
                  if (!glyph.disabled) {
                     if (vertical) {
                        scaledX = vx / fontSizeScale;
                        scaledY = (x + vy) / fontSizeScale;
                     } else {
                        scaledX = x / fontSizeScale;
                        scaledY = 0;
                     }

                     if (font.remeasure && width > 0) {
                        // some standard fonts may not have the exact width, trying to
                        // rescale per character
                        var measuredWidth = ctx.measureText(character).width * 1000 /
                           current.fontSize * current.fontSizeScale;
                        var characterScaleX = width / measuredWidth;
                        restoreNeeded = true;
                        ctx.save();
                        ctx.scale(characterScaleX, 1);
                        scaledX /= characterScaleX;
                        if (accent) {
                           scaledAccentX /= characterScaleX;
                        }
                     }

                     this.paintChar(character, scaledX, scaledY);
                     if (accent) {
                        scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
                        scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
                        this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
                     }
                  }

                  x += charWidth;

                  canvasWidth += charWidth;

                  if (restoreNeeded) {
                     ctx.restore();
                  }
               }
               if (vertical) {
                  current.y -= x * textHScale;
               } else {
                  current.x += x * textHScale;
               }
               ctx.restore();
            }

            if (textSelection) {
               geom.canvasWidth = canvasWidth;
               if (vertical) {
                  var VERTICAL_TEXT_ROTATION = Math.PI / 2;
                  geom.angle += VERTICAL_TEXT_ROTATION;
               }
               this.textLayer.appendText(geom);
            }

            return canvasWidth;
         },
         showSpacedText: function CanvasGraphics_showSpacedText(arr) {
            var ctx = this.ctx;
            var current = this.current;
            var font = current.font;
            var fontSize = current.fontSize;
            // TJ array's number is independent from fontMatrix
            var textHScale = current.textHScale * 0.001 * current.fontDirection;
            var arrLength = arr.length;
            var textLayer = this.textLayer;
            var geom;
            var canvasWidth = 0.0;
            var textSelection = textLayer ? true : false;
            var vertical = font.vertical;
            var spacingAccumulator = 0;

            if (textSelection) {
               ctx.save();
               this.applyTextTransforms();
               geom = this.createTextGeometry();
               ctx.restore();
            }

            for (var i = 0; i < arrLength; ++i) {
               var e = arr[i];
               if (isNum(e)) {
                  var spacingLength = -e * fontSize * textHScale;
                  if (vertical) {
                     current.y += spacingLength;
                  } else {
                     current.x += spacingLength;
                  }

                  if (textSelection)
                     spacingAccumulator += spacingLength;
               } else {
                  var shownCanvasWidth = this.showText(e, true);

                  if (textSelection) {
                     canvasWidth += spacingAccumulator + shownCanvasWidth;
                     spacingAccumulator = 0;
                  }
               }
            }

            if (textSelection) {
               geom.canvasWidth = canvasWidth;
               if (vertical) {
                  var VERTICAL_TEXT_ROTATION = Math.PI / 2;
                  geom.angle += VERTICAL_TEXT_ROTATION;
               }
               this.textLayer.appendText(geom);
            }
         },
         nextLineShowText: function CanvasGraphics_nextLineShowText(text) {
            this.nextLine();
            this.showText(text);
         },
         nextLineSetSpacingShowText:
            function CanvasGraphics_nextLineSetSpacingShowText(wordSpacing,
                                                               charSpacing,
                                                               text) {
               this.setWordSpacing(wordSpacing);
               this.setCharSpacing(charSpacing);
               this.nextLineShowText(text);
            },

         // Type3 fonts
         setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
            // We can safely ignore this since the width should be the same
            // as the width in the Widths array.
         },
         setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
                                                                              yWidth,
                                                                              llx,
                                                                              lly,
                                                                              urx,
                                                                              ury) {
            // TODO According to the spec we're also suppose to ignore any operators
            // that set color or include images while processing this type3 font.
            this.rectangle(llx, lly, urx - llx, ury - lly);
            this.clip();
            this.endPath();
         },

         // Color
         setStrokeColorSpace: function CanvasGraphics_setStrokeColorSpace(raw) {
            this.current.strokeColorSpace = ColorSpace.fromIR(raw);
         },
         setFillColorSpace: function CanvasGraphics_setFillColorSpace(raw) {
            this.current.fillColorSpace = ColorSpace.fromIR(raw);
         },
         setStrokeColor: function CanvasGraphics_setStrokeColor(/*...*/) {
            var cs = this.current.strokeColorSpace;
            var rgbColor = cs.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.strokeStyle = color;
            this.current.strokeColor = color;
         },
         getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR, cs) {
            if (IR[0] == 'TilingPattern') {
               var args = IR[1];
               var base = cs.base;
               var color;
               if (base) {
                  var baseComps = base.numComps;

                  color = base.getRgb(args, 0);
               }
               var pattern = new TilingPattern(IR, color, this.ctx, this.objs,
                  this.commonObjs, this.baseTransform);
            } else if (IR[0] == 'RadialAxial' || IR[0] == 'Dummy') {
               var pattern = Pattern.shadingFromIR(IR);
            } else {
               error('Unkown IR type ' + IR[0]);
            }
            return pattern;
         },
         setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
            var cs = this.current.strokeColorSpace;

            if (cs.name == 'Pattern') {
               this.current.strokeColor = this.getColorN_Pattern(arguments, cs);
            } else {
               this.setStrokeColor.apply(this, arguments);
            }
         },
         setFillColor: function CanvasGraphics_setFillColor(/*...*/) {
            var cs = this.current.fillColorSpace;
            var rgbColor = cs.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.fillStyle = color;
            this.current.fillColor = color;
         },
         setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
            var cs = this.current.fillColorSpace;

            if (cs.name == 'Pattern') {
               this.current.fillColor = this.getColorN_Pattern(arguments, cs);
            } else {
               this.setFillColor.apply(this, arguments);
            }
         },
         setStrokeGray: function CanvasGraphics_setStrokeGray(gray) {
            this.current.strokeColorSpace = ColorSpace.singletons.gray;

            var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.strokeStyle = color;
            this.current.strokeColor = color;
         },
         setFillGray: function CanvasGraphics_setFillGray(gray) {
            this.current.fillColorSpace = ColorSpace.singletons.gray;

            var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.fillStyle = color;
            this.current.fillColor = color;
         },
         setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
            this.current.strokeColorSpace = ColorSpace.singletons.rgb;

            var rgbColor = this.current.strokeColorSpace.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.strokeStyle = color;
            this.current.strokeColor = color;
         },
         setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
            this.current.fillColorSpace = ColorSpace.singletons.rgb;

            var rgbColor = this.current.fillColorSpace.getRgb(arguments, 0);
            var color = Util.makeCssRgb(rgbColor);
            this.ctx.fillStyle = color;
            this.current.fillColor = color;
         },
         setStrokeCMYKColor: function CanvasGraphics_setStrokeCMYKColor(c, m, y, k) {
            this.current.strokeColorSpace = ColorSpace.singletons.cmyk;

            var color = Util.makeCssCmyk(arguments);
            this.ctx.strokeStyle = color;
            this.current.strokeColor = color;
         },
         setFillCMYKColor: function CanvasGraphics_setFillCMYKColor(c, m, y, k) {
            this.current.fillColorSpace = ColorSpace.singletons.cmyk;

            var color = Util.makeCssCmyk(arguments);
            this.ctx.fillStyle = color;
            this.current.fillColor = color;
         },

         shadingFill: function CanvasGraphics_shadingFill(patternIR) {
            var ctx = this.ctx;

            this.save();
            var pattern = Pattern.shadingFromIR(patternIR);
            ctx.fillStyle = pattern.getPattern(ctx, this);

            var inv = ctx.mozCurrentTransformInverse;
            if (inv) {
               var canvas = ctx.canvas;
               var width = canvas.width;
               var height = canvas.height;

               var bl = Util.applyTransform([0, 0], inv);
               var br = Util.applyTransform([0, height], inv);
               var ul = Util.applyTransform([width, 0], inv);
               var ur = Util.applyTransform([width, height], inv);

               var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
               var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
               var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
               var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);

               this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
            } else {
               // HACK to draw the gradient onto an infinite rectangle.
               // PDF gradients are drawn across the entire image while
               // Canvas only allows gradients to be drawn in a rectangle
               // The following bug should allow us to remove this.
               // https://bugzilla.mozilla.org/show_bug.cgi?id=664884

               this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
            }

            this.restore();
         },

         // Images
         beginInlineImage: function CanvasGraphics_beginInlineImage() {
            error('Should not call beginInlineImage');
         },
         beginImageData: function CanvasGraphics_beginImageData() {
            error('Should not call beginImageData');
         },

         paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
                                                                              bbox) {
            this.save();
            this.current.paintFormXObjectDepth++;
            this.baseTransformStack.push(this.baseTransform);

            if (matrix && isArray(matrix) && 6 == matrix.length)
               this.transform.apply(this, matrix);

            this.baseTransform = this.ctx.mozCurrentTransform;

            if (bbox && isArray(bbox) && 4 == bbox.length) {
               var width = bbox[2] - bbox[0];
               var height = bbox[3] - bbox[1];
               this.rectangle(bbox[0], bbox[1], width, height);
               this.clip();
               this.endPath();
            }
         },

         paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
            var depth = this.current.paintFormXObjectDepth;
            do {
               this.restore();
               // some pdf don't close all restores inside object
               // closing those for them
            } while (this.current.paintFormXObjectDepth >= depth);
            this.baseTransform = this.baseTransformStack.pop();
         },

         beginGroup: function CanvasGraphics_beginGroup(group) {
            this.save();
            var currentCtx = this.ctx;
            // TODO non-isolated groups - according to Rik at adobe non-isolated
            // group results aren't usually that different and they even have tools
            // that ignore this setting. Notes from Rik on implmenting:
            // - When you encounter an transparency group, create a new canvas with
            // the dimensions of the bbox
            // - copy the content from the previous canvas to the new canvas
            // - draw as usual
            // - remove the backdrop alpha:
            // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
            // value of your transparency group and 'alphaBackdrop' the alpha of the
            // backdrop
            // - remove background color:
            // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
            if (!group.isolated) {
               info('TODO: Support non-isolated groups.');
            }

            // TODO knockout - supposedly possible with the clever use of compositing
            // modes.
            if (group.knockout) {
               TODO('Support knockout groups.');
            }

            var currentTransform = currentCtx.mozCurrentTransform;
            if (group.matrix) {
               currentCtx.transform.apply(currentCtx, group.matrix);
            }
            assert(group.bbox, 'Bounding box is required.');

            // Based on the current transform figure out how big the bounding box
            // will actually be.
            var bounds = Util.getAxialAlignedBoundingBox(
               group.bbox,
               currentCtx.mozCurrentTransform);
            // Use ceil in case we're between sizes so we don't create canvas that is
            // too small and make the canvas at least 1x1 pixels.
            var drawnWidth = Math.max(Math.ceil(bounds[2] - bounds[0]), 1);
            var drawnHeight = Math.max(Math.ceil(bounds[3] - bounds[1]), 1);

            var scratchCanvas = CachedCanvases.getCanvas(
               'groupAt' + this.groupLevel, drawnWidth, drawnHeight, true);
            var groupCtx = scratchCanvas.context;
            // Since we created a new canvas that is just the size of the bounding box
            // we have to translate the group ctx.
            var offsetX = bounds[0];
            var offsetY = bounds[1];
            groupCtx.translate(-offsetX, -offsetY);
            groupCtx.transform.apply(groupCtx, currentTransform);

            // Setup the current ctx so when the group is popped we draw it the right
            // location.
            currentCtx.setTransform(1, 0, 0, 1, 0, 0);
            currentCtx.translate(offsetX, offsetY);
            // The transparency group inherits all off the current graphics state
            // except the blend mode, soft mask, and alpha constants.
            copyCtxState(currentCtx, groupCtx);
            this.ctx = groupCtx;
            this.setGState([
               ['SMask', 'None'],
               ['BM', 'Normal'],
               ['ca', 1],
               ['CA', 1]
            ]);
            this.groupStack.push(currentCtx);
            this.groupLevel++;
         },

         endGroup: function CanvasGraphics_endGroup(group) {
            this.groupLevel--;
            var groupCtx = this.ctx;
            this.ctx = this.groupStack.pop();
            // Turn off image smoothing to avoid sub pixel interpolation which can
            // look kind of blurry for some pdfs.
            if ('imageSmoothingEnabled' in this.ctx) {
               this.ctx.imageSmoothingEnabled = false;
            } else {
               this.ctx.mozImageSmoothingEnabled = false;
            }
            this.ctx.drawImage(groupCtx.canvas, 0, 0);
            this.restore();
         },

         beginAnnotations: function CanvasGraphics_beginAnnotations() {
            this.save();
            this.current = new CanvasExtraState();
         },

         endAnnotations: function CanvasGraphics_endAnnotations() {
            this.restore();
         },

         beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
                                                                  matrix) {
            this.save();

            if (rect && isArray(rect) && 4 == rect.length) {
               var width = rect[2] - rect[0];
               var height = rect[3] - rect[1];
               this.rectangle(rect[0], rect[1], width, height);
               this.clip();
               this.endPath();
            }

            this.transform.apply(this, transform);
            this.transform.apply(this, matrix);
         },

         endAnnotation: function CanvasGraphics_endAnnotation() {
            this.restore();
         },

         paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
            var domImage = this.objs.get(objId);
            if (!domImage) {
               error('Dependent image isn\'t ready yet');
            }

            this.save();

            var ctx = this.ctx;
            // scale the image to the unit square
            ctx.scale(1 / w, -1 / h);

            ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
               0, -h, w, h);
            if (this.imageLayer) {
               var currentTransform = ctx.mozCurrentTransformInverse;
               var position = this.getCanvasPosition(0, 0);
               this.imageLayer.appendImage({
                  objId: objId,
                  left: position[0],
                  top: position[1],
                  width: w / currentTransform[0],
                  height: h / currentTransform[3]
               });
            }
            this.restore();
         },

         paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
            var ctx = this.ctx;
            var width = img.width, height = img.height;

            var glyph = this.processingType3;

            if (COMPILE_TYPE3_GLYPHS && glyph && !('compiled' in glyph)) {
               var MAX_SIZE_TO_COMPILE = 1000;
               if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
                  glyph.compiled =
                     compileType3Glyph({data: img.data, width: width, height: height});
               } else {
                  glyph.compiled = null;
               }
            }

            if (glyph && glyph.compiled) {
               glyph.compiled(ctx);
               return;
            }

            var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
            var maskCtx = maskCanvas.context;
            maskCtx.save();

            putBinaryImageData(maskCtx, img);

            maskCtx.globalCompositeOperation = 'source-in';

            var fillColor = this.current.fillColor;
            maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
               fillColor.type === 'Pattern') ?
               fillColor.getPattern(maskCtx, this) : fillColor;
            maskCtx.fillRect(0, 0, width, height);

            maskCtx.restore();

            this.paintInlineImageXObject(maskCanvas.canvas);
         },

         paintImageMaskXObjectGroup:
            function CanvasGraphics_paintImageMaskXObjectGroup(images) {
               var ctx = this.ctx;

               for (var i = 0, ii = images.length; i < ii; i++) {
                  var image = images[i];
                  var width = image.width, height = image.height;

                  var maskCanvas = CachedCanvases.getCanvas('maskCanvas', width, height);
                  var maskCtx = maskCanvas.context;
                  maskCtx.save();

                  putBinaryImageData(maskCtx, image);

                  maskCtx.globalCompositeOperation = 'source-in';

                  var fillColor = this.current.fillColor;
                  maskCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
                     fillColor.type === 'Pattern') ?
                     fillColor.getPattern(maskCtx, this) : fillColor;
                  maskCtx.fillRect(0, 0, width, height);

                  maskCtx.restore();

                  ctx.save();
                  ctx.transform.apply(ctx, image.transform);
                  ctx.scale(1, -1);
                  ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
                     0, -1, 1, 1);
                  ctx.restore();
               }
            },

         paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
            var imgData = this.objs.get(objId);
            if (!imgData)
               error('Dependent image isn\'t ready yet');

            this.paintInlineImageXObject(imgData);
         },

         paintInlineImageXObject:
            function CanvasGraphics_paintInlineImageXObject(imgData) {
               var width = imgData.width;
               var height = imgData.height;
               var ctx = this.ctx;

               this.save();
               // scale the image to the unit square
               ctx.scale(1 / width, -1 / height);

               var currentTransform = ctx.mozCurrentTransformInverse;
               var a = currentTransform[0], b = currentTransform[1];
               var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
               var c = currentTransform[2], d = currentTransform[3];
               var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);

               var imgToPaint;
               if (imgData instanceof HTMLElement) {
                  imgToPaint = imgData;
               } else {
                  var tmpCanvas = CachedCanvases.getCanvas('inlineImage', width, height);
                  var tmpCtx = tmpCanvas.context;
                  putBinaryImageData(tmpCtx, imgData);
                  imgToPaint = tmpCanvas.canvas;
               }

               var paintWidth = width, paintHeight = height;
               var tmpCanvasId = 'prescale1';
               // Vertial or horizontal scaling shall not be more than 2 to not loose the
               // pixels during drawImage operation, painting on the temporary canvas(es)
               // that are twice smaller in size
               while ((widthScale > 2 && paintWidth > 1) ||
                  (heightScale > 2 && paintHeight > 1)) {
                  var newWidth = paintWidth, newHeight = paintHeight;
                  if (widthScale > 2 && paintWidth > 1) {
                     newWidth = Math.ceil(paintWidth / 2);
                     widthScale /= paintWidth / newWidth;
                  }
                  if (heightScale > 2 && paintHeight > 1) {
                     newHeight = Math.ceil(paintHeight / 2);
                     heightScale /= paintHeight / newHeight;
                  }
                  var tmpCanvas = CachedCanvases.getCanvas(tmpCanvasId,
                     newWidth, newHeight);
                  tmpCtx = tmpCanvas.context;
                  tmpCtx.clearRect(0, 0, newWidth, newHeight);
                  tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
                     0, 0, newWidth, newHeight);
                  imgToPaint = tmpCanvas.canvas;
                  paintWidth = newWidth;
                  paintHeight = newHeight;
                  tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1';
               }
               ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight,
                  0, -height, width, height);

               if (this.imageLayer) {
                  var position = this.getCanvasPosition(0, -height);
                  this.imageLayer.appendImage({
                     imgData: imgData,
                     left: position[0],
                     top: position[1],
                     width: width / currentTransform[0],
                     height: height / currentTransform[3]
                  });
               }
               this.restore();
            },

         paintInlineImageXObjectGroup:
            function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
               var ctx = this.ctx;
               var w = imgData.width;
               var h = imgData.height;

               var tmpCanvas = CachedCanvases.getCanvas('inlineImage', w, h);
               var tmpCtx = tmpCanvas.context;
               putBinaryImageData(tmpCtx, imgData);

               for (var i = 0, ii = map.length; i < ii; i++) {
                  var entry = map[i];
                  ctx.save();
                  ctx.transform.apply(ctx, entry.transform);
                  ctx.scale(1, -1);
                  ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
                     0, -1, 1, 1);
                  if (this.imageLayer) {
                     var position = this.getCanvasPosition(entry.x, entry.y);
                     this.imageLayer.appendImage({
                        imgData: imgData,
                        left: position[0],
                        top: position[1],
                        width: w,
                        height: h
                     });
                  }
                  ctx.restore();
               }
            },

         // Marked content

         markPoint: function CanvasGraphics_markPoint(tag) {
            // TODO Marked content.
         },
         markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
            // TODO Marked content.
         },
         beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
            // TODO Marked content.
         },
         beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
            tag, properties) {
            // TODO Marked content.
         },
         endMarkedContent: function CanvasGraphics_endMarkedContent() {
            // TODO Marked content.
         },

         // Compatibility

         beginCompat: function CanvasGraphics_beginCompat() {
            // TODO ignore undefined operators (should we do that anyway?)
         },
         endCompat: function CanvasGraphics_endCompat() {
            // TODO stop ignoring undefined operators
         },

         // Helper functions

         consumePath: function CanvasGraphics_consumePath() {
            if (this.pendingClip) {
               if (this.pendingClip == EO_CLIP) {
                  if ('mozFillRule' in this.ctx) {
                     this.ctx.mozFillRule = 'evenodd';
                     this.ctx.clip();
                     this.ctx.mozFillRule = 'nonzero';
                  } else {
                     try {
                        this.ctx.clip('evenodd');
                     } catch (ex) {
                        // shouldn't really happen, but browsers might think differently
                        this.ctx.clip();
                     }
                  }
               } else {
                  this.ctx.clip();
               }
               this.pendingClip = null;
            }
            this.ctx.beginPath();
         },
         getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
            var inverse = this.ctx.mozCurrentTransformInverse;
            // max of the current horizontal and vertical scale
            return Math.sqrt(Math.max(
               (inverse[0] * inverse[0] + inverse[1] * inverse[1]),
               (inverse[2] * inverse[2] + inverse[3] * inverse[3])));
         },
         getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
            var transform = this.ctx.mozCurrentTransform;
            return [
               transform[0] * x + transform[2] * y + transform[4],
               transform[1] * x + transform[3] * y + transform[5]
            ];
         }
      };

      return CanvasGraphics;
   })();



   PDFJS.disableFontFace = false;

   var FontLoader = {
      insertRule: function fontLoaderInsertRule(rule) {
         var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
         if (!styleElement) {
            styleElement = document.createElement('style');
            styleElement.id = 'PDFJS_FONT_STYLE_TAG';
            document.documentElement.getElementsByTagName('head')[0].appendChild(
               styleElement);
         }

         var styleSheet = styleElement.sheet;
         styleSheet.insertRule(rule, styleSheet.cssRules.length);
      },
//#if !(MOZCENTRAL)
      get loadTestFont() {
         // This is a CFF font with 1 glyph for '.' that fills its entire width and
         // height.
         return shadow(this, 'loadTestFont', atob(
            'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
               'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
               'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
               'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
               'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
               'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
               'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
               'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
               'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
               'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
               'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
               'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
               'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
               'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
               'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
               'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
               'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
               'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
               'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
               'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
               'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
               'ABAAAAAAAAAAAD6AAAAAAAAA=='
         ));
      },

      loadTestFontId: 0,

      loadingContext: {
         requests: [],
         nextRequestId: 0
      },

      isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() {
         if (isWorker)
            return false;

         // User agent string sniffing is bad, but there is no reliable way to tell
         // if font is fully loaded and ready to be used with canvas.
         var userAgent = window.navigator.userAgent;
         var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
         if (m && m[1] >= 14)
            return true;
         // TODO other browsers
         return false;
      })(),

      bind: function fontLoaderBind(fonts, callback) {
         assert(!isWorker, 'bind() shall be called from main thread');

         var rules = [], fontsToLoad = [];
         for (var i = 0, ii = fonts.length; i < ii; i++) {
            var font = fonts[i];

            // Add the font to the DOM only once or skip if the font
            // is already loaded.
            if (font.attached || font.loading === false) {
               continue;
            }
            font.attached = true;

            var rule = font.bindDOM();
            if (rule) {
               rules.push(rule);
               fontsToLoad.push(font);
            }
         }

         var request = FontLoader.queueLoadingCallback(callback);
         if (rules.length > 0 && !this.isSyncFontLoadingSupported) {
            FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request);
         } else {
            request.complete();
         }
      },

      queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
         function LoadLoader_completeRequest() {
            assert(!request.end, 'completeRequest() cannot be called twice');
            request.end = Date.now();

            // sending all completed requests in order how they were queued
            while (context.requests.length > 0 && context.requests[0].end) {
               var otherRequest = context.requests.shift();
               setTimeout(otherRequest.callback, 0);
            }
         }

         var context = FontLoader.loadingContext;
         var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
         var request = {
            id: requestId,
            complete: LoadLoader_completeRequest,
            callback: callback,
            started: Date.now()
         };
         context.requests.push(request);
         return request;
      },

      prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
                                                                    fonts,
                                                                    request) {
         /** Hack begin */
            // There's currently no event when a font has finished downloading so the
            // following code is a dirty hack to 'guess' when a font is
            // ready. It's assumed fonts are loaded in order, so add a known test
            // font after the desired fonts and then test for the loading of that
            // test font.

         function int32(data, offset) {
            return (data.charCodeAt(offset) << 24) |
               (data.charCodeAt(offset + 1) << 16) |
               (data.charCodeAt(offset + 2) << 8) |
               (data.charCodeAt(offset + 3) & 0xff);
         }

         function string32(value) {
            return String.fromCharCode((value >> 24) & 0xff) +
               String.fromCharCode((value >> 16) & 0xff) +
               String.fromCharCode((value >> 8) & 0xff) +
               String.fromCharCode(value & 0xff);
         }

         function spliceString(s, offset, remove, insert) {
            var chunk1 = data.substr(0, offset);
            var chunk2 = data.substr(offset + remove);
            return chunk1 + insert + chunk2;
         }

         var i, ii;

         var canvas = document.createElement('canvas');
         canvas.width = 1;
         canvas.height = 1;
         var ctx = canvas.getContext('2d');

         var called = 0;
         function isFontReady(name, callback) {
            called++;
            // With setTimeout clamping this gives the font ~100ms to load.
            if(called > 30) {
               warn('Load test font never loaded.');
               callback();
               return;
            }
            ctx.font = '30px ' + name;
            ctx.fillText('.', 0, 20);
            var imageData = ctx.getImageData(0, 0, 1, 1);
            if (imageData.data[3] > 0) {
               callback();
               return;
            }
            setTimeout(isFontReady.bind(null, name, callback));
         }

         var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
         // Chromium seems to cache fonts based on a hash of the actual font data,
         // so the font must be modified for each load test else it will appear to
         // be loaded already.
         // TODO: This could maybe be made faster by avoiding the btoa of the full
         // font by splitting it in chunks before hand and padding the font id.
         var data = this.loadTestFont;
         var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
         data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
            loadTestFontId);
         // CFF checksum is important for IE, adjusting it
         var CFF_CHECKSUM_OFFSET = 16;
         var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
         var checksum = int32(data, CFF_CHECKSUM_OFFSET);
         for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
            checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
         }
         if (i < loadTestFontId.length) { // align to 4 bytes boundary
            checksum = (checksum - XXXX_VALUE +
               int32(loadTestFontId + 'XXX', i)) | 0;
         }
         data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));

         var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
         var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
            url + '}';
         FontLoader.insertRule(rule);

         var names = [];
         for (i = 0, ii = fonts.length; i < ii; i++) {
            names.push(fonts[i].loadedName);
         }
         names.push(loadTestFontId);

         var div = document.createElement('div');
         div.setAttribute('style',
            'visibility: hidden;' +
               'width: 10px; height: 10px;' +
               'position: absolute; top: 0px; left: 0px;');
         for (i = 0, ii = names.length; i < ii; ++i) {
            var span = document.createElement('span');
            span.textContent = 'Hi';
            span.style.fontFamily = names[i];
            div.appendChild(span);
         }
         document.body.appendChild(div);

         isFontReady(loadTestFontId, function() {
            document.body.removeChild(div);
            request.complete();
         });
         /** Hack end */
      }
//#else
//bind: function fontLoaderBind(fonts, callback) {
//  assert(!isWorker, 'bind() shall be called from main thread');
//
//  for (var i = 0, ii = fonts.length; i < ii; i++) {
//    var font = fonts[i];
//    if (font.attached)
//      continue;
//
//    font.attached = true;
//    font.bindDOM()
//  }
//
//  setTimeout(callback);
//}
//#endif
   };

   var FontFace = (function FontFaceClosure() {
      function FontFace(name, file, properties) {
         this.compiledGlyphs = {};
         if (arguments.length === 1) {
            // importing translated data
            var data = arguments[0];
            for (var i in data) {
               this[i] = data[i];
            }
            return;
         }
      }
      FontFace.prototype = {
         bindDOM: function FontFace_bindDOM() {
            if (!this.data)
               return null;

            if (PDFJS.disableFontFace) {
               this.disableFontFace = true;
               return null;
            }

            var data = bytesToString(this.data);
            var fontName = this.loadedName;

            // Add the font-face rule to the document
            var url = ('url(data:' + this.mimetype + ';base64,' +
               window.btoa(data) + ');');
            var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';

            FontLoader.insertRule(rule);

            if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
               globalScope['FontInspector'].enabled)
               globalScope['FontInspector'].fontAdded(this, url);

            return rule;
         },
         getPathGenerator: function (objs, character) {
            if (!(character in this.compiledGlyphs)) {
               var js = objs.get(this.loadedName + '_path_' + character);
               /*jshint -W054 */
               this.compiledGlyphs[character] = new Function('c', 'size', js);
            }
            return this.compiledGlyphs[character];
         }
      };
      return FontFace;
   })();


}).call((typeof window === 'undefined') ? this : window);

if (!PDFJS.workerSrc && typeof document !== 'undefined') {
   // workerSrc is not set -- using last script url to define default location
   PDFJS.workerSrc = (function () {
      'use strict';
      var scriptTagContainer = document.body ||
         document.getElementsByTagName('head')[0];
      var pdfjsSrc = scriptTagContainer.lastChild.src;
      return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
   })();
}

